I think he is talking about how the default is full screen instead of maximize window. Full screen meaning the entire screen with no application and system bar visible and maximized window meaning taking the whole space but still showing the application and system bar. Anecdotally I have seen many more mac users doing stuff in a small window than windows or linux users.
I specifically said anecdotlly. Your experience and my experience a not representative of anything. Also that is only a small portion of my comment and was meant more a a sidenote.
We were also not talking about windowed mode at all here. It was specifically about what happens when you press the green window control button, which as far as I know puts the app in fullscreen on macos and the equivalent on any other OS known to me is to maximize the window.