It's not just that -- it's that you routinely use such strong language when discussing this topic. "Everybody will play to their maximum potential when they play slow..." disregards the obvious evidence that many, many players at the very top, not only don't play slow -- but they play fast. So you need to send this info to Strickland, Filler, Shaw, SVB when he's rolling, a recent Sky who's been playing better and faster, AND possibly the greatest cue sportsman of all-time -- Ronnie O'Sullivan.
If you went to them with this data you would be laughed out of the room. Sometimes the data doesn't tell the whole story.
SVB isn't in the fast player group. Conversely, he is a careful, deliberate player. Your claim that Sky plays better fast is so obviously not true I don't see how you can say it with a straight face. If you have paid any attention you certainly can't believe it, but maybe you just don't pay attention or keep up with people's games. Sky slowed down his game a good bit and that directly resulting in a BIG jump up in his game, a night and day difference (as it did with Shaw as another example, although they could continue to see more improvement by being a little more careful and deliberate yet). You also try to paint it out as if there are fast players everywhere in the top ranks and that simply isn't true either, not as a percentage. Only a relatively small percentage of the top players are fast players, and even among them the trend is that when they slow down they tend to shoot better. It's all pretty telling when one is willing to look at the evidence with an unbiased honest mind.
Notwithstanding all that, you are arguing against something I didn't say, a strawman. I agree that phenomenal pool has been played fast but that has nothing to do with what I actually said. What I actually said is that everybody will on average play to their fullest potential when they play at a slower (careful, deliberate) pace. The evidence for this is everywhere you look. The trend is that the better the players, the more time they tend to take, and the top of the heap has always tended to be filled with the more careful, deliberate players. Particularly telling is that every single player that has ever slowed down their game has ended up playing better as a result of it. I can't think of a single exception. Yes, you can find examples of guys like Earl who played great fast. What you are ignoring is that the evidence says that he would have been even better had he slowed down a bit and been more careful and deliberate.
Common sense tells you that slower, careful, deliberate play will lead to the best results as well. It's all about reducing errors, physical and mental. Reducing errors requires being careful and deliberate, and you just can't be as careful as you need to be when shooting fast.
Obviously you aren't a careful, deliberate enough player or you wouldn't arguing what you are arguing and would already know that it results in the best pool. So I challenge you to give it an honest try and find out for yourself. Take just a little more time to analyze your best option in shot choice, positional route, strategy, etc. Take just a little more time to make sure you are fully committed to the shot. Take just a little more time to as best as possible work past the nerves you are feeling on a shot. Take just a little more time to make sure you are fully grooved in your stroke and aim etc. Take just a little more time to reduce the tension in your arm and get it as relaxed as possible. Etc. I'm not saying get stupid about it, just slow things a little to be just a little more careful and deliberate about everything. Your game will improve, guaranteed.
Maybe not right at first when you dislike it and have a mental block against it, or when you just aren't yet used to it, but after you let it become your new rhythm of comfort it will result in you shooting better. It has worked for literally every other single person that has ever done it that I am aware of (which is tons and tons of people, including 100% of the many pros that have done it). Even if there are some one in a hundred exceptions that can be found the odds say you aren't likely to end up being one of them. I know with some honest thought you will see the same thing, tons of examples where players have improved when they slowed down and got more careful, but you are going to struggle to come up with any examples where a player's game suffered when they slowed down and became more careful (if they gave it the time to get used to it). So go do it and then come back to me and tell me it didn't work. You aren't going to be that unicorn exception and if I hear back from you what I'm going to hear is "for whatever reason I just never thought it would be true but you were right, thanks for that, it upped my game".