> There's nothing at all wrong with the behavior, and it's perfectly logical once you understand what is going on, but it's certainly not intuitive.
I find the "app-less desktop" of Windows and all the Linux DE's I've tried (i.e. the big ones) far more weird and infuriating. It's easy to lose context of what app is focused, since a slight dimming of buttons isn't quite as obvious as I'd like. Reading the word of the app in the menu bar, even if it's just through my peripheral vision, makes the focus behavior far more obvious.
And an "app-less desktop" more or less necessitates that you now dedicate an entire meta/super/Windows/whatever key to the window manager, which is just such a waste of keyboard real estate, as well as a driver for key command inconsistency. In macOS, Cmd+N will (nearly) always make a new window for the app that you're in; Cmd+W will close it; Cmd+Q will quit it. In Windows, Cmd+N works for everything, but to make my first file explorer window, I have to hit Windows+E. And to quit an app, it's...Alt+F4, for some reason?
The trickle-down effects of this design are endless -- I've just laid out the basics of the basics here.