Reasons vary between people. It’s not important. If you want to know, ask the people in question.
Don’t think everyone SHOULD be doing it like you. If you feel like being upbeat, be upbeat. ACCEPT not everyone is but they don’t get to force their view on you either.
It’s naive to think one way is more “right” than the other.
That’s one of the many issues with expecting a collective resolution. Question is: why do people feel they need to be able to discuss issues way beyond their understanding and personal experience online with others who also don’t know much about it? If actually done well, moderation is a full time job but nobody is interested in paying a bunch of online jannies to clean their space.
That’s why I favor individual responsibility, and opting out of the possibility of being exposed to (or perpetuating) misinformation. Maybe in the future we can have forums for verified experts of a field, where regular people can have discussions with them and ask questions etc. But these would be moderated places where you do need to bring proof and sound arguments, not emotionally charged headlines.
The stories and information posted on social media are artistic works of fiction and falsehood. Only a fool would take anything posted as fact.
If we want to go the route of the Responsibility of the Individual: Resolve to not get your political etc. news from social media. Draw a line for yourself: cool to get gaming news from random influencers online? Probably. News about global events? At this point might be better for most people’s mental health to ignore them and focus more locally. However, read how to read a book, make your best effort at finding a reputable news organization and check those for news if you must have them. On same vein, if you don’t read at least some article about an event being discussed on social media, DON’T COMMENT. Don’t engage with that post. If it really grabs at you, go find an article about it from a trusted source, and depending on how much it animates you, try to get a bigger picture of the event. Assume that vast majority of ALL CONTENT online is currently incentivized to engage you - to capture your attention, which is actually the most valuable asset you have. Where you put your attention will define how you feel about your life. It’s highly advicable to put it where you feel love.
Responsibility of the Collective: Moving in hierarchies, we can start demanding that social media moderators (or whatever passes for those in any given site) prevent misinformation as much as possible. Try to only join communities that have mods that do this. Failing that, demand social media platforms prevent misinformation. Failing that, we can demand the government does more to prevent misinformation. All of those solutions have significant issues, one of them being they are all very incentivized to capture the attenttion of as many people as possible. Doesn’t matter what the exact motivation is - it could be a geneinly good one. A news organization uses social media tactics to get the views so that their actually very factual and dilligently compiled articles get the spread. Or, they could be looking to drive their political agenda - which they necessarily do anyway because desire to be factual and as neutral as possible is a stance as well. One that may run afoul of the interests of some government that doesn’t value freedom of press - which is very dangerous and you need to think hard for yourself how you feel about the idea of the government limiting what kind of information you can access. For the purposes of making this shorter, you can regard massive social media platforms as virtual governments too. In fact, it would be a good idea in general.
The thing with misinformation is that many people who talk about it subtly think that they are above it themselves. They’re thinking that they know they’re not subject to propaganda and manipulation but it’s the other poor fools that need to be protected from it. It’s the Qanon and Antivaxxers. But you know better, you know how to dig deeper into massively complicated global topics and find out what the true and right opinion about them is. You can’t. Not even if we weren’t in the middle of multiple fucking information wars. You’d do well to focus on what you can know for sure, in your own experience. If you don’t like the idea of individual responsibility though, because “most people aren’t going to do it” - your best bet at getting a collective response is a group of individuals coming together under the same ideal. It’ll happen sooner or later anyway and there’s going to be plenty of suffering before either way.
I’m going to make a guess that majority of people looking at this question have grown up in countries with Christian cultural background. Meaning even if they aren’t religious, their more or less subconscious believes about the nature of reality may involve some vague ideas about souls, absolute good and evil and so on. Separate entities in a hierarchical world. From that perspective, reincarnation is never going to sound anything but magical.
But if you drop your belief in you as a separate entity, literally everything is a “reincarnation” of you, if you want to use that word. But it’s not the “you” that you think you are. Reality is prior to your thought about it, as thoughts are just imperfect reflections of reality.
You get a disconnect when you try to take a concept like reincarnation from a thought-framework such as Buddhism, without being REALLY FUCKING INTIMATELY STEEPED IN IT, and then try to fit it into whatever dualistic worldview you’re likely holding in this largely Chisto-capitalistic world that is hell bent on making sure you always feel separate, alone and not enough.
It really is like taking a power plug from the EU and then being surprised it doesn’t fit in the socket in the USA. And then going off about what a stupid design EU has while not ever even considering if the socket is even meant to receive that kind of a plug (because in YOUR opinion, your socket must be perfect in every way and could never ever be questioned).
Get Waking Up by Sam Harris… Or read Adyashanti, Rupert Spira, Loch Kelly, Jayasara, Kiran Trace, Christopher Wallis, Bernardo Kastrup, many more. It’s all available out there but unfortunately a lot gets dismissed because “nooo muh materialistic worldview that is required for the current capitalistic hellscape that’s slowly destroying our world can’t possibly be wrong”. So many people are pushing the collective cart towards doom, complain about the doom and the cart but never question what they so deeply believe that they won’t just stop pushing.