How can another platform be better about this? Wouldn’t they be subject to the same thing? Or is there some component here that is not tied to the Apple demand?
I think there are several reasons users gravitate to apps, but the biggest pain point apps mitigate is the login UX. I'd wager that you use a password manager, most people do not and cannot be convinced to do so. With an app, one can create an account and log in once, then stay logged in and never think about the password again until they get a new device, at which time the password can be reset via email and then immediately forgotten.