Turning without running over other surfers

When i'm watching surfing video's I notice often the guy doing the maneuver is almost running over a surfer doing a duckdive or trying to get out of the way. This fact often attracts my attention more than the actual maneuver.. I take it these are the very advanced surfers who know exactly what they are doing?
Surfing crowded brakes in Bali it happens to me all the time I must abort the turn cos somebody is in the way. I don't (belum) feel confident to do the turn that close to someone without hitting him/her.
I put in lots of hours practising getting to the experience level that brings me to the right position on the right wave in the right moment to do the right maneuver, the maneuver i'm dreaming off. It's so frustrating to see someone in the way so u can't do it.
Any idea's how to approach this?
Surfing crowded brakes in Bali it happens to me all the time I must abort the turn cos somebody is in the way. I don't (belum) feel confident to do the turn that close to someone without hitting him/her.
I put in lots of hours practising getting to the experience level that brings me to the right position on the right wave in the right moment to do the right maneuver, the maneuver i'm dreaming off. It's so frustrating to see someone in the way so u can't do it.
Any idea's how to approach this?