I dont think his idea was about the amount of gear pros are taking compared to olympians. He is wondering the number of pros out there compared to the number of people who compete at the olympia.
Looked aorund and couldnt find a set number for the number of professional male bodybuilders there are right now, but here is a list off wiki.
List of male professional bodybuilders - Wikipedia, the free encyclopedia
There are well over a few thousand I believe throughout the world. Not really sure havent kept up much with it, but you see guys continually gaining their pro cards. With the thousands there are, there are only 24 people competing for the olympia this year. So there is a big step between just being a pro and being in the olympia. Although many pros are pretty close to getting there/if not should be there in alot of peoples minds.