@Captain Spatula While respeccing, we can't choose abilities we have not previously unlocked. That has been confirmed by Terran ages ago. Moreover, that is a crucial fact, and our every leveling plan has been heavily influenced by this concept for over twenty levels! It is a huge factor in making plans!
While actually reading the most crucial author's notes is the best, being ignorant about confirmed facts is still fine. In that case one can always look to more diligent voters for ideas and help. Repeating questions already answered by Terran before is also understandable, and a way to get in.
However, being ignorant and at the same time saying things like "I think it's probably like this", completely passing by multiple paragraphs of analysis, author confirmation, and argumentation done by more diligent voters, somehow rankles. It's perfectly fine to disagree, but that usually requires one to actually have good arguments for it. Actually reading both the opposing side's points and the subject matter's relevant facts would also help.
I'm not saying all voters don't make false assumptions and thus get wrong conclusions. At least I do that all the time. I'm just saying that if someone wants to disagree with a matter of which a lot has been written already, at least they should catch one of those false assumptions and not just ignore all the other voters' previous work.
TL;DR
Questions for Terran, and exasperated complaints about other voters just blatantly ignoring a lot of careful analysis while making their own points based on arguments already confirmed to be false by the author.