Everyone should do what works for them, but with e.g. flash it takes 3 keypresses in most cases to go to any position I can see on the screen, without taking my hands off the keyboard. I was relatively late to Vim but I would never go back, even just for the improved physical ergonomics of not having to move my arm repetitively back and forth between mouse and keyboard.
It feels a little like people that swear that they can type perfectly well with 2 fingers - I have seen some very fast 2 finger typists, but in truth they're missing out on efficiency and comfort in the long run because they don't want to face the short-term pain of learning the better technique (and it is pain).