Historically, US pornography has been regulated on the basis of whether or not it is obscene, defined by various Supreme Court tests over the years.
If it is not obscene, it's afforded First Amendment protections and allowed.
If it is obscene, it can be regulated by various entities, should they choose to do so.
Since the mid-70s(?), the Miller test [0] has been used.
Parent is pointing out that the Internet effectively obliterated the technical ability of various government entities to impose restrictions of any sort on obscene material, and consequently there's been essentially no regulation of internationally-based pornographic content since the 90s.
If it is not obscene, it's afforded First Amendment protections and allowed.
If it is obscene, it can be regulated by various entities, should they choose to do so.
Since the mid-70s(?), the Miller test [0] has been used.
Parent is pointing out that the Internet effectively obliterated the technical ability of various government entities to impose restrictions of any sort on obscene material, and consequently there's been essentially no regulation of internationally-based pornographic content since the 90s.
[0] https://en.m.wikipedia.org/wiki/Miller_test