Assist to TO ratio is important for a PG, since they do the majority of the ball handling. You'd like to see your PG have a high assist total, or if his main objective is to score, then to keep TO's to a minimum. If he can't handle that, he's usually just a SG not playing off the ball. I would agree that distribution is the priority of a PG. Nothing wrong with scoring a lot as the PG, as long as you're helping your team win. Its just not the PG position in the classical sense and you hope that rest of the offense doesn't struggle or become stagnant as your dribble the ball around for your own shot.