Good post, more or less fully agree, except I still don't get this bit: "In a safer world, I would have wished for my parents to have hidden that book better..."

Why? Not the "in a safer world" part, I get why you put that clause there, I think. It's the rest of it. Why would you have rather not learned the things in that book at an early age? If you don't mind explaining that one, I'm genuinely curious why you would have preferred, (in a safer world) not having learned that at an early age.

(Also, "I don't know if my parents ever thought about the child-adult dichotomy when they weren't talking to me.", well, presumably easy enough, to at least to a first approximation, to find out. (If you're interested) Ask them, or even point them right at this post and see/ask for their reaction.)