Those "natural pros" are not really pros. In most of those organizations, they become pros after 3 years of training.
you must have missed the very long thread regarding the B&A show, where Melvin and Bob kept insisting that anyone entering the B&A show would be putting their NPC career at risk, that they'd be considered a pro by the NPC because there were prizes being given out at the B&A show, and pros weren't allowed in the amateur NPC. We then listed all the pros from Musclemania, the WNBF and other organizations who were currently competing in the NPC. Bob and Melvin kept insisting there were consequences!