First of all that isn't the "whole point" of fandom and even if you believe that, it certainly doesn't need to be that way. A lot of people on this board certainly take batshit crazy theories and speculations to an extreme. Embarrassingly so sometimes.
Trekbbs can be something better than that but only if people want it to be better.
Fandom is whatever people want it to be. That's part of the fun. If people want to speculate and make theories and have fun doing so, I'm not clear on why you have to profanely denigrate them, imply that the board needs to be "better," or call them "embarrassing," and it's not just this once; you do it all the time. To my knowledge, no one has ever dressed you down over it using aggressive language, either.
Maybe just sit the sorts of discussions out that you don't like and we'll just mark you down for being profanely embarrassed for the boxscore.