OP, this will be my one attempt to help you salvage your potential standing in the TN community.
Coming from someone who has been lifting all of 8 months, the comment above is the sort that rubs people the wrong way. It would be one thing if your attitude was ‘Hi, I’m a noob who is new to TN. I’ve been reading a lot about high-frequency training; what do you guys think about it?’ But instead, you decide it is The Truth on a level akin to the Eleventh Commandment, and proceed to argue the point with people who have something all the studies in the world can’t compete with–years and years of experience. (Yeah, I know how little you think of experience. More on this below.)
Speaking of experience: Eight months. That’s how long you’ve been training. I have containers of protein powder older than that. Consider: How would you feel if someone who had been lifting for 8 days were to argue with you, to tell you you were wrong? (And for a few of us who have been at this for much longer than you’ve been alive, the apt comparison would be more like someone arguing with you who’d been lifting for 8 minutes.) If the 8-day lifter were to dismiss your knowledge and experience out of hand, no doubt you would be incredulous, and would consider him an arrogant SOB. You would probably shake your head and walk away when he started mouthing off, knowing full well he had no idea what he was talking about.
Again, speaking of experience: Here is but one example of where your unearned arrogance gets you in trouble. You demand to see “evidence,” and denigrate those who proffer their extensive experience as such. But you follow this up by acknowledging that “bodybuilding is murky.” Which is absolutely correct–BBing is murky. That is, it’s simply impossible for even the best-executed research to capture all of the relevant variables. And given the inescapable, inherent murkiness of BBing, the #1 most important predictive factor for useful BBing knowledge isn’t research, it’s experience. That is, if someone has (or had) a contest-winning physique, and has coached hundreds of other people to where they had contest-winning physiques, that is as strong as evidence gets of being correct in the murky world of BBing.
Now, does it prove they’re right–that their method is best? Of course not. But proof is a standard not achievable in BBing. So for someone with a track record like that of @The_Mighty_Stu, it is not necessary that he ‘provide explanations as to why his methods work’ in order for them to be considered legitimate; his methods are prima facie correct, based on the results he has achieved for himself and hundreds of clients. Put another way: The proof is in the pudding.
And speaking one last time of experience: In my TN experience, people who come in with your attitude either adjust it and hang around, or they don’t adjust it, in which case they get trolled/hounded off the site (not by me–I’ll simply ignore you). The way things go is entirely up to you.
Done.