Only Rudeus knew how much bullying had damaged his past life, so he made sure he’d never let it happen to the people around him again.
He became the person he needed back then.
Sexual misconduct feels closer to everyday real life happenings. Genocide does not. People are ready to separate “I enjoy this fictional killer” from “I like real killing” till it's time to do the same to shows with sexual content. It's what we call double standards.