sexualizing minors in anime

I see a lot of it especially in the mha fandom or haikyuu fandom and honestly i find it really gross as a minor myself. I get that they're fictional and most people try to argue by saying "fiction doesn't affect reality" "they don't look like real teenagers" "they're adults in the manga" . I've seen those excuses especially with adult cosplayers on tiktok doing sexual stuff while cosplaying as teens which again make me , a minor, feel really uncomfortable. They "claim" the characters which they're cosplaying are aged up but still wear school uniforms. Crushing on them is fine but why do you have to sexualize them? It's not that hard to keep your horny in control