The way you think about these things is just wrong.
Yes, it is theoretically impossible to say any pro player is cheating. And yes every clip can be explained away. But I, and many others, are absolutely certain that there is cheating happening in the scene.
I'm going to use an extreme example here.
Let's say I'm a low profile player. For a couple years I lurk around the lower echelon of NA teams, when suddenly I get picked up by TSM or something. Suddenly I get over 100 suspicious clips in the space of a year, compared to my previous zero. Every clip shows a very similar kind of suspicious behavior (locking on people through walls in crucial rounds, getting suspicious wallbangs and maybe a couple of seemingly blatant lock ons), but every clip can theoretically be explained. You can say "we are only seeing these now because he's in the spotlight more and people are looking harder" among other things, but doing that would miss the point. It's suspicious when there are this volume of clips from a single player in such a short span of time.
Obviously no one has this amount of clips, but the point is the same. You would dismiss every clip just because its possible to explain them, without addressing what their existence means. There are many other high profile players who have been playing for years with almost no suspicious clips, while suddenly all these new "up and coming" players are jumping out of the woodwork doing shady shit left, right and center. It just doesn't make sense.
Dismissing the possibility that people cheat in the pro scene displays the same amount of ignorance as someone who says every pro is cheating. This is why we need these things to be looked instead of being dismissed completely, because if it's not looked into there's no way to know for sure.
You can keep talking down on people that claim that people in the scene cheat, just understand that you're being a massive hypocrite every time you do it.