Really explain why Bodybuilders retire then if Steroids are a perfect fountain of youth. Why does every pro seem to get old and die eventually? Can Arnold just take an ungodly amount of Test and go win the Olympia Again???
Even if their body can tolerate the abuse, eventually they reach their ceiling of competiveness and can go no further. They can't win contests.
They are tired of the lifestyle of eating every two hours, dieting, the health risks, schmoeing for money, the expense, injuries, etc.
Some guys love bodybuilding and keep on like Tony Pearson and Albert Beckles.
Some are only in it for the competition aspect.