I often see people praising gnome for it's keyboard efficiency but they are not even 10% as good as macos.

If they cared so much, they would have keyboard shortcut for everything, in every app, with the top bar displaying menu and every shortcut attributed to it, just like macos.

Instead you can use the keyboard to switch an app, close it and so on but once you are working inside, you immediately need to take your mouse. What's the point ? It saves 1 second and confuse lot of beginners.

I'm not sure what you mean - pretty much every modern GNOME application has keyboard shortcuts. In fact they use a consistent keyboard shortcut to bring up the screen that shows all the keyboard shortcuts: ctrl+?