Earlier quoted context omitted.
> Mac OS itself confuses things by forcing apps to be full screen, rather than sizing to the content I don't understand what you mean. macOS has never forced apps to be full screen.
It doesn't force applications to be fullscreen, but it does have garbage tooling for managing multiple windows on the screen simultaneously. Even windows has better with hotkeys and gestures for snapping to parts of the screen.
During the OS X brain transplant and particularly after Lion it became a hybrid that’s neither here or there, unfortunately.