I mean, I can't just leave the app running in the foreground forever, that's the dumbest thing I've ever heard if they actually expect people to do that.
Even if I leave my app open, but not necessarily showing on the screen at the moment, after a short while, if you go back to it, it's still open without re-logging in - - but - BUT . . . after a certain amount of time being open, when you access it, it STILL has to re-log you back in.