Much of the Anti-Porn sediment you see on the Internet is astroturfed nonsense that mostly came from the Dissident Right back when the Alt-Right was at their peak of popularity and back when Big Tech started to censor the Online Right during the 2010's.
This mostly came from people like Gavin McInnes (a former Rebel News commentator that went indie and he's now irrelevant), Andrew Torba (the owner of Gab which is also now irrelevant), and eventually Nick Fuentes when he became the new face of the Dissident Right.
You did had some conservative politicians that were against porn but they were a minority that even the rest of the GOP didn't took seriously back in the day. This was pushed by those on the Dissident Right that thought Trump getting elected back in 2016 was going to lead to America establishing the Fourth Reich so some people like Gavin McInnes and Andrew Torba pushed for the censorship of porn (which never went anywhere as the GOP lost their seats to the Democrats during the 2018 midterm elections and Trump badly losing to Biden during the 2020 election).
There's a lot of valid criticisms against the porn industry (such as how they prey on brand new 18 year olds and lure them with the opportunity to make some easy money). But the reason why much of the Anti-Porn stuff is a grift is for the same reason why the rest of the Dissident Right is a grift. The Dissident Right once believed that Trump being in office will somehow lead to America establishing a new Aryan nation but they failed to acknowledge that Trump is a pro-Israel politician that holds on to 1990's Democratic polices and his bad economic policies has hindered the Right in the long-term.
Kiwi Farms is still stuck in 2017 where in their own delusions they think Trump and the GOP (where they're still overwhelmingly pro-Isreal, Trump deported Nazi war criminals back to Europe during his first term, and Trump personally attended a gay wedding and enjoyed his time there) is somehow going to establish the Fourth Reich when Trump still thinks foreign countries pay for tariffs (it's why people like Nick Fuentes and other people on the Dissident Right have turned against Trump now because even people like Nick Fuentes have finally realized that Trump won't give them what they want).
American Conservatism is dying, the Dissident Right isn't relevant anymore; Kiwi Farms should get with the times and embrace Libertarianism because that is the direction that the Online Right is heading at now.