Commenter above isn't defending those things though... And in fact revenge porn, CP and other awful content appear across all social platforms. And just like Pornhub they remove them when notified. Thought experiment, what happened to piracy when Napster shut down? What would adding subscription options and regulating Napster have done. Would it have created spotify a decade earlier and disincenvtised the development of Gnutella, bitorrent etc?
Right now we have a moral panic, fuelled by a microscopic proportion of content on a site, being used to fuel laws and economic exclusion to remove freedom of action from an entire industry. The consequences are, if not obvious, entirely predictable. Porn will balkanise, and what regulation exists (very strict in its production, relatively strict in its dissemination) will disappear. Sites like only fans being shut down - as with backpage, will force sex worker into enormously more dangerous street work, and ultimately lead to a vast amount of exploitation. And all this will happen, in practice not to protect the vanishingly smaller numbers of trafficked women, or children who appear on these platforms. But because an ungodly coalition of rabbidly anti-porn, anti-sexwork Christian fundamentalists, and anti-porn, anti-sexwork radical feminists have undue political influence.