In my country, there’s no US style cafeteria (instead it’s a canteen where it’s up to the student if they want to buy anything) some bring their own lunches (home or leftovers) to school, so why do American kids rely on cafeteria food instead of bringing their own?
I mean, is cafeteria food across American schools that bad? It depends on where one resides or if they attend a public or private school. In my case I went to a private (Catholic) high school and the food there is actually good (& cheap when converted to USD).
Ignoring private schools, it really depends on locale. Most schools are run by a combination of local and state guidelines. So each state has its own minimum standards, which are then implemented on a district level.
However, in some districts, the budget isn’t equal between all schools.
So you can have varying quality within the same school system, and even more between different systems.
The good thing about school meals is that they aren’t usually super expensive, don’t require packing only foods that won’t spoil or be gross by lunch time, and there’s usually some kind of budget for free reduced cost lunches (sometimes breakfast too) for those in need. It makes sense that most students will choke down even the bad options instead.
Some schools do damn well though. The bulk is usually going to be supplied by one of the industrial food distributors, but most of that is similar to or the same as what you’d get in terms of ingredient quality as chain restaurants.
So the staff of the cafeteria can make a huge difference in quality right there. Knowing how to turn fairly meh ingredients into something tasty is a great thing.
When schools supplement with fresh produce, it can be damn good food. Local farmers out in rural areas often contribute. Some high schools have agriculture programs where they grow stuff that gets used in their own school, and may be distributed to others. Our closest high school supplements their own cafeteria, plus the elementary schools, and part of the jr high schools (some of those have their own gardens, so they tend to handle their own). My kid was very happy with the high school’s food, unlike the food at their jr high in another state that they hated.
I ate at the high school a couple of times. Waaaaaay better than when I was a student there, and the agriculture program was starting up back then. Mind you, the lady that ran the cafeteria was doing a great job with what she had. The supplies were just crap back then. All canned shit for veggies if it wasn’t grown local, mandated recipes on a schedule set by the county, so you could only do so much to improve things. She ran a damn good kitchen though, so even when the food was bad, we knew the cooks were doing their best.
And that’s pretty much the problem with school food. It just isn’t a nationwide priority.