At some point the prestige & funding are just too much of an incentive to not take advantage of it.
It's probably easy to morally justified in their minds because they believe their hypthosis is correct
But most agree there is benefit to having sport activities in our society. And that doping is detrimental to it.
It also attracts millions of taxpayers money, lots of athletes, especially those going to Olympics, get funded.
But originally I wasn't making a comparison based on negative impact on society, but comparing the incentive structure.