There are only so many openings for U.S. Senators and Representatives. There are a limited number of sports teams that athletes can play for. There are a limited number of movies shot each year, using a limited number of actors. The government regulates how many doctors and lawyers can enter the workplace each year.
Many industries have a limited number of "jobs" available, and if there are more job applicants than there are jobs available, you've got a problem. But again, not with pro speaking!
Cavett Roberts founded the National Speakers Association with the idea that "when more people come to the table, we'll bake a bigger pie!" As a pro speaker, you create your own job opening! (Of course, you gotta know how.)
You don't have to wait for a pro speaker "job opening" - it's waiting for you!