This is an understatement.
I wasn't being ambiguous. Classic RTS players are ahead of most of all players. Maybe not 80%, that's an exaggeration. Perhaps more like 50-60%.
Knowledge, for the purpose of this conversation comes in two forms. Propositional knowledge and procedural knowledge. Starcraft players have the latter, but not the former. The thing is, propositional knowledge is very easily taught. Something like a warding guide is propositional knowledge because you only need to follow A, B and C instructions to solve your problem.
Tread switching is not propositional knowledge, it's procedural knowledge. It requires muscle memory, presence of mind, and the ability to multitask, skills that can only be acquired through practice, which requires many orders of magnitude more time than simply reading a guide, and then applying it, because you had enough prior training that you can skip the practice phase every really new player goes through.
You are straight up incorrect if you think that Tread switching is not propositional knowledge. Like you said, you have a problem of needing mana, you solve it with Int treads, so on and so fourth. There is hardly any multitasking going on here. It's problem, solution, that's all there is to it. Apply this as necessary as problems come up. Sure, you'll commit this to muscle memory eventually, but for now it is still propositional knowledge. Starting out you would have to actively think about Tread switching, but it's really brief, and not going to get in the way.
Not to insinuate, but this discussion with Hylian feels exactly like the half dozen or so discussions I've been a part of where me or someone else calls out an acquaintance on a racist/sexist opinion.
It's just hours of rationalizing "I'm not wrong, you're just misunderstanding me" instead of actually listening, eventually ending in "you're just mad because of ____ that happened last week". At some point, you're more mad at the argument then whatever incorrect assumption you were arguing about, and everyone ends up salty as fuck with zero progress.
Are you sure you aren't insinuating? It seems like you are when you're going to compare me to racists and sexists now when we were talking about fucking boots in a video game. I never got to any point of "You're just mad because x". I don't know why you're trying to stir up trouble posting garbage like this.