I can definitely hit my Return key with more precision than I can drag a cursor over a 40x400px target but go off :P

(I use a Superior Technologies trackball because it's the only mouse I could find manufactured in the USA and it's really not very precise, it's kind of a self handicap to nudge me towards keyboard shortcuts, muscle memory gains just have a steeper curve on keyboard than mouse)

You still need several key strokes to get there ;) So it's not as precise as an actual precision pointing device

Maybe this is a physical development thing? Because i can't imagine a world in which my mouse is more accurate than my keyboard. The mouse requires two-way responsive action. I have to both move the mouse and observe the movement with my eyes to update the movement as necessary.

With the keyboard there is no such coordination, I simply think the thing i want to happen and press the appropriate keys.