People here come from all kinds of realities. We might not even exist where you do.

[He was pretty sure that Santa wasn't a real guy at home, for instance. The illusion didn't last very long when he and his parents were both home all the time, barring unusual circumstances like going to buy Christmas gifts.]

But ja, it's partly just to learn to use our powers safely, but it's good to have someplace to retreat to, too.