If you choose to be reborn, you will not have magic powers, but you will unlock a status window and a skill tree that you can use to give yourself new skills and abilities and improve your physical characteristics.
You’ll get the same thing if you choose to be reincarnated, however, magic will be a factor. And the age of the world will be somewhere like 50-ish years before the full rollout of the industrial revolution, technology-wise. (minor clarification, you keep your current knowledge either way)
However, you will not be the hero or the chosen one. You’re just going to be a person with a perk.
2 questions:
No one asked you to believe in angels or demons or devas or yokai or anything else that is objectively not real. The fact that’s how some people define “magic” does not mean that’s the only definition. Some people have defined marriage as a holy sacrament exclusive to their mythological beliefs. That doesn’t mean that’s the only definition, and I find it odd that you would dismiss the very many viewpoints that do not have such an Abrahamic bias.
We do not have all the answers to every question nor are we ever likely to, if for no other reason than the maximum information density of our brains is finite and a mind vast enough to know everything would necessarily exceed the limits of our finite universe.
Now, far from finding imagination foolish, I think it’s one of our most important skills, but let’s be clear, most of the fantasy magic systems we fantasize about would be objectively terrible because in almost every case, the consequences of such a world would not be how we imagine it, particularly since every magic system we imagine is almost universally internally inconsistent. That by no means suggests we should stop imagining, I merely stated I’d rather live in a world that has consistent rules than one that is arbitrary and capricious.
Perhaps you might learn to practice some humility and ask a question or two before you go throwing around terms like “ghoulish.”