The incentive to use PEDs is almost certainly higher in other professional sports than cycling. For athletes in leagues like the MLB, NFL, NBA etc. the average career is quite short and you essentially need to make all of the money for your entire life in 3-4 yeas. Plus the step function of being in the league and making millions vs just missing a roster spot and making almost nothing is so extreme you'd be foolish not to take PEDs to give yourself the best chance at a payday.