Of course there are competitive bodybuilders with families and careers. Look at Marc Dugdale. Dorian always worked until he could make a living off bodybuilding, ran a gym, and has a family.
However, for every hard working IFBB pro or top ranking amateur, there are many of the type that I described. Please refer to the old T-mag article, Sex, Lies, and Muscle; it's easy to spot each former competitor described, some of them being former Olympia competitors.
There many CURRENT examples of what I described.