I think much of your post and position are fairly reasonable and common positions, particularly here on the fediverse, but I do kinda think you lost the plot here. Just cause you dont see the appeal of romance doesnt no one else does, and that the only reason someone would watch a romantic coming of age story is because they wanna fuck kids 😅
I like romance. I like seeing the themes of romance across a lot of people. Though generally queer romance, as it makes me happy to see stories of queer love and it feels like I have more cultural connection to the way romance looks in queer stories, regardless of pairing.
Romance frequently gets written as young people, because its a time of discovery and that heightens the tension as the characters are learning to navigate things together.
I didnt peak in highschool, I was going through a mental health crisis, I barely even got to experience highschool honestly. I just like seeing romance in media. The highschool ones usually aren't quite as good though, especially in anime and manga- they tend to be fairly samey and rely on tropes, and as a result end up with underdeveloped characters. Not always though, sometimes they're really beautifully written :)
I can understand by being grossed out by depictions of young people experiencing intimate things. But like, there are stories about people in all stages of life 😅 a coming of age story is a familiar structure because its a big experience that really shapes you as a human. And romance is a fairly core human experience for most folks too (though certainly not all). I think you just dont get the point, and thats okay but not everyone who finds joy or sees meaning in that kinda story is a wannabe child fucker