Your opinion is not objective. My only agenda is to ensure that folks who come in here seeking information don't go away with the impression that perfectly safe, perfectly serviceable, equipment used by millions of cyclists around the world, some of whom do some pretty extreme off-tarmac riding with drop bars and bar end shifters, is "frankly dangerous". As to how to change gear without taking your hands off the bars? I can't explain it, I just do it. Comes completely naturally.