When an aspiring pro starts to gain size, it would become clear at some point of their size increase that there are some genetic setbacks regarding muscle tie-ins and joint structure that would make it difficult to create an aesthetic and symmetrical physique that would score well with judges. (eg: Kamali, Freeman, Heiko).
If this is the case, why bother waisting all that time and money trying to make a 'career' out of bodybuilding, if its clear that no amount of training will cover up these flaws?