While mulling this over, and a few other things I have seen on Chess.com related to chess education/ability, that seem to have, perhaps two schools of thought pertaining to it, it seems that either some people have a preference for some reason, or want to sound as if they know what they are talking about, even if they don't, or even may be trying to keep potential competition in the dark.
The last of those really jumps out at me about certain individuals. They seem to be the type who literally would use anything to their advantage, including encouraging you to feel as if, by virtue you are obligated to adhering to "theories" they believe to be best, keeping you half way prepared for being able to beat them. Something tells me they have done some of the very things, they tell you not to, it has helped them and they know it will help you. In the dog eat dog world of the fierce chess competition, it seems like a bone that some prefer to chew on.
What i found interesting is after running my games through Fritz i found that roughly 60% of my USCF C class games were decided by tactics. And now that im a B player 30% of my games are decided by tactics.
I know the "positional" vs. "Tactical" arguement has been beaten to death here, but i dont know how anyone can only want to study half of the game.