I think Japan would make a really good case study. Childlike aesthetics and behaviors are strongly sexualized in Japan. They also produce the most simulated CSAM per capita with few laws restricting production. Actual child pornography wasn't made illegal until 1999. They still sell photo books of tweens in swimsuits and stuff in Japan. That, and lolicon, which is basically hentai with kids in it.
There isn't the same stigma against attraction to children, and we see that some 15-20% of the Japanese male population holds some aesthetic preferences that most westerners would consider pedophilic.
I think we'd probably see similar numbers in America if we could cut though the stigma, which some people would panic over, but if anything we should be relieved that despite such numbers, actual sexual abuse of children is very rare.
I mean, the writing is on the wall already. Nothing in the West is more sexualized than youth, we just like to pretend that 18 is some magical age where you looked completely different the day before your birthday or something, and ignore that puberty comes a lot earlier than that.
What really matters is the social norms surrounding these things. We shouldn't care if a 40 year old man thinks a 15 year old girl is attractive, we should care if he tries to do anything about that attraction, because the latter is a conscious choice that does harm, while the former is more complex matter of human sexual response.