it’s fundamentally trying to solve a problem I don’t want solved.
It’s trying to solve a problem that does not exist IMHO.
Their use cases are children and old people, which are users that probably use a single app at the time anyway.
It’s not true to say their use cases are just “children and old people”; they’re saying that while it’s more of a obstacle to ease-of-use in those groups, all users have to manually relocate poorly placed application windows.
If the OS can remove the need to do that, it improves workflow.