Doge you're bizarrely hung up on the OP. Conversations evolve. The OP was from October.
That said in cycling amateurs regularly race against folks from other categories, including pros. And while most won't race against WT pros many do race against domestic pros or guys who can race across in the big leagues. People on each level want to improve and make the next level. If someone is doping in there it's bound to change the level of the playing field.
That said, we got it. In your view masters are the problem. Gear restrictions are equivalent to someone doing EPO, and the lack of any statistical protocol is irrelevant to the fact that masters clearly dope in far greater number than any demographic. Funny thing is the next one to get popped is probably someone in your kid's cohort. So tread carefully with all the silliness you spout. You're apt to need to do mia culpas at some point. Because the one thing the statistics have shown is that the overwhelming majority of guys racing on the pointy end of the world stage are dirty. And odds are that doesn't start when they get there.