I can't deny that hindsight bias may be working, despite my awareness of it.

What I can say for sure is that I did in fact never even seek a causal, reductionist explanation for the mysterious dark side or the Q-H resonance, in a cognitive error I see as very comparable to the Wizengamot just accepting that Dementor-scaring was a "Boy-Who-Lived quality" without any explanation.

While it now seems to me that I could have deduced it, that part may be totally false. I didn't even suspect Quirrell until I read about other people doing so. :/