For me, it's about comfort. No need to bounce my right hand between the home row, the arrow keys and the mouse. No need to stretch my left pinky to Ctrl and Shift for every shortcut. Everything is near the home row in Vim, by design.
Comfort and reducing context switching overhead. Targeting a specific screen area with the mouse just takes way too much attention.
Comfort and reducing context switching overhead. Targeting a specific screen area with the mouse just takes way too much attention.