It turns out that moving the cursor using the mouse is dramatically faster than using the arrow keys, and moving using incremental search (Raskin's LEAP) is dramatically faster than that. So while you're eating your dirt off the arrow keys, the rest of us are already at the point where we want to make our edits, we've already made the edits, and we've rerun the test suite with another keystroke to verify that the edits fixed the bug. See you later, I gotta go to lunch. Have fun with your arrow keys.
Moving your hands from the keyboard to the mouse (and back) takes longer than getting to where you want using Vim navigation on the keyboard. You can also use intelligent movements (e.g. f" = to the next " on this line, or /foo = to the next line with foo or 362G = to line 362) instead of pounding the keyboard like crazy.
