Utter speculation with little basis in fact. Ron and some others are much stronger. In his case was also previously an athlete, unlike Lou or Columbu.
Yeah, Franco boxed and Lou dominated the Superstars competition one year, and did well another year, against athletes from real sports. He would lose about 20 lbs and train a little different for a while, but he was athletic. Even though he never played organized football, he got a tryout for the CFL, because he was such a great combination of speed and strength, with above average agility.
Of course, back then bodybuilders were even less developed, and still needed to drop some weight to be more athletic. If Ronnie or some of the others trained for WSM competition, they might do very well.