I would go as far as to say no for most heroes.
Sure, lower sensitivity can help some people lead targets better with maybe snipers and like, Mcree, but having a low sensitivity is going to severely handicap you if you go up against someone running max sens (who is actually good with it) because they will literally run circles around you while you struggle to keep your sights on them. I've had friends who play with like 20 sens on Xbox, and after spectating them, I can definitely understand why they rank where they do.