First you have no way of knowing exactly how many of those players come on this site or even care about coming on this site. That is a problem because say someone is just not into online debates, now you are saying they are guilty just because they won't come on hear and denounce your statement.
Secondly lets say you accused the entire NFL of being on PEDs, by your logic every NFL player is now obligated to go out and swear on their loved ones life that they have never used or they are guilty. This is why people ask you to provide names because right now you are literally saying 90+ percent are doing it with absolutely zero facts to substantiate it.
The end result is that because of your unsubstantiated over exaggeration, nobody takes you seriously. There has not been a single person in any of these threads that I have seen say there is zero PED or altered bat use.
My personal belief is that it is less pervasive than in the era that you played. Instead of playing with single walls and restricted flight balls, you now have the hottest bats ever made that are hot out of the wrapper while hitting golf balls. A direct result of this is that you now have 140 lb E players hitting the ball 350'. There are some bats these days that straight out of the wrapper with no alteration barely pass compression. This has reduced the need for bat shaving because when composites first came out most required hundreds of swings to finally get hot, now you can take 20 swings and its ready to go.