Why is the NTR genre so popular in Japanese adult content, and how might it influence society?

What's NTR?

Not sure about Japan but what I noticed on sites like the f95zone forums is that the people who are specifically opposed to NTR seem to have an unhealthy obsession with it when compared with the people who just don't like most other kinks, even compared to kinks most people find distasteful or morally questionable.

This is cuckolding? Is that not a popular genre everywhere? Or at least here (US) it seems so.

NTR’s popularity is driven by its ability to provoke strong emotional reactions, offer psychological catharsis, and deliver narratives that diverge from mainstream romantic or erotic stories.

Its influence can be harmful, potentially desensitizing viewers to trust violations, normalizing unhealthy relationship dynamics, and perpetuating negative stereotypes, though others see it as a means of exploring complex emotions or reflecting societal issues.