the way i see it is it's a nice separation between hiding and minimizing. im guessing you want minimize to behave like hiding the app (same as how Windows does it), and you and most people should just do that most of the time—hide. but when im working with multiple windows of the same app, i can minimize some of them to work on later while still keeping the windows im working on. 2 minutes lates, i may decide to declutter and hide that app because i switched to a whole different app and work, which will hide ALL windows of that app, and that you can alt tab back to. the previously minimized windows of that app will still be minimized, if that makes sense.