Probably not tangential. From your Wikipedia link:
South Korea is one of the few countries that explicitly prohibit any form of pornography.
Studies show that availability of porn reduces incidence of rape. It's not something most people want to hear. They want to believe all rapists are evil monsters, not that at least some are men with no socially acceptable means to meet their needs.
I'm not convinced of the causality here. It's more likely that societies that are so repressed as to ban pornography also are too repressed to handle sex-related issues, whatever they are. Rapists are a small percentage of the population, most of them fall under cluster B personality disorder, and their prevalence does not change much across cultures.
Openness about sex allows two things: first, abusers can actually be caught, and stopped from re-offending; second, the unacceptable nature of sex offenses is on public display.
Could Japan be a natural experiment in this regard? It's quite repressed (right?) but there is little censorship. It seems Japan has a much lower rate according to the first stats my web search showed me: https://worldpopulationreview.com/countries/rape-statistics-...
South Korea is one of the few countries that explicitly prohibit any form of pornography.
Studies show that availability of porn reduces incidence of rape. It's not something most people want to hear. They want to believe all rapists are evil monsters, not that at least some are men with no socially acceptable means to meet their needs.