How do they catch so many big b?

Whenever I watch Linders angling edge or Bill Dance or In-fisherman and they are catching b I wonder how they keep the average size of their b so high. I get the strategies and presentations and everything, but how do they make sure they pull up so many big b? They get 4-6 pounders with regularity. Even when up north! An average fisherman like me could go to the same places and use the same techniques in the same conditions and only catch 1-3 pounders. So how do they get all the big ones?