If they copied well then that would be one thing. But they don't copy well either. In Windows 10 (and 11 too) if you resize a window by dragging the bottom border, the bottom of the window does not quite touch the taskbar: there is a few pixels of gap, which is just a waste. I didn't understand why they did that... until I realized that's because MacOS has that too.
If a chimpanzee views a person perform a series of superfluous actions, along with one single necessary action, in order to obtain a piece of food, the chimpanzee will skip the superfluous action, and perform only the necessary one. In contrast, children will copy every single action, including the unnecessary ones [1]. Microsoft isn't being as smart as a chimpanzee in their copying.