I'm still waiting for the day when people will stop being absurdly neurotic about sexuality and just let people share their stuff as long as it's age flagged appropriately. It's so absurd that the most normal thing on earth is put into the same moderation category as harassment or hate speech.
As another poster pointed out, it's not just the US, though with the US's economic dominance it's a huge factor. China and middle eastern nations don't like sexual content either. Basically, the governments in these places want you to concentrate on the state-sanctioned religion instead of relieving your biological urges with porn. So in the middle east, they want you thinking about Islam all day long. In the US, they want you thinking about Jesus n' Guns. In China, they want you thinking about the glory of Xi and the CCP. I'm pretty surprised actually that Russia hasn't cracked down on porn yet.
The porn industry has lobby groups. The main industry one is the Free Speech Coalition, but the Adult Performance Artist Guild, the porn actors labor union, does lobbying (sometimes in conjunction with FSC where their interests coincide), too.
They don’t have nearly the resources, grassroots base, or supply of Russian money the NRA has had, OTOH, neither is in the degree of legal mess the NRA is currently in, either.
Unfortunately we can't have this discussion until we talk about the larger issue of society catering to people's made up fairy tale religions, which is the root of this puritanical anti-sex behavior.
If I said that Earth was at the center of the solar system, up is down and the sky is green you would tell me that I'm wrong and misinformed, but if I said that I believe in a magical man in the sky who can walk on water and will send everyone to Hell for eternity for looking at porn then suddenly my "faith" has to be respected and everyone else has to change their behaviors to accommodate it. It's utter nonsense.
Utter nonsense is people wanting to promote degeneracy in society and all of the media allowing the propagation of perversion onto children to the point that sexual exploitation and objectification is just an accepted part of life. More than faith, modesty is a value that those without it perhaps can never realize the wisdom of it.
> just let people share their stuff as long as it's age flagged appropriately.
Sure, you can do that on Twitter already, plenty of depraved porn on that platform. Imgur doesn't have to allow that. It's not like there is a lack of places on the internet where you can post porn.