[someguyiguess]

That seems incredibly subjective. For people with carpal tunnel like myself, having to do everything on the keyboard can be very painful. The mouse alleviates that and gives visual feedback.

[bigyabai]

That's a good reason to support the mouse as a backup peripheral, but not a good reason to gimp keyboards in your interface.

Seeing as both can be accommodated, I would argue it's an objective limitation of macOS.

[someguyiguess]

Fair point