For one they use any number of drugs/hormones to control the side effects, large doses like 1mg/d of Anastrozole so I would not agree that abuse levels of T are not problematic for them. Further, if, IF, drugs/hormones were taken off the table for the elite of BB/PL those guys are genetic anomalies anyway and they honestly still be the Champs, hormones or not (assuming a level playing field).