Watching the boxing events at the Olympics with some friends and the question arose that I couldn't answer. Why, when one becomes a "professional" boxer, does the headgear come off for pro bouts? Is it purely marketing (seeing the head and face, greater chance of knockouts to sell to the paying public?)

I'm a proponent for keeping the headgear on as a pro: I can see what you look like before and after the fight. A blow to the head should be the same points to the ring judges whether you're wearing protection or not. I just don't see the rationale for saying once you get paid to box, you should ditch the headgear. Thoughts?