Of course conservatism is hypocrisy, conservative men will always use porn and prostitutes and blame it on women. But someone on the old subreddit explained perfectly why conservative values about sexuality are still preferable to liberal ones: because it's better for society at least pretend to be decent and have some shame attached to indecency than to be openly, shamelessly indecent. Liberal society REVELS on sexual misogyny and degeneracy, every sick thing is celebrate and elevated into something noble, a form of liberation and female empowerment, sign of enlightenment and progress. In conservative society everyone at least agrees in public that men paying women to call them slurs and prolapse their assholes for their own sadistic enjoyment is NOT a good thing and shouldn't be encouraged. Sexual exploitation of women in porn/prostitution is like drug use, we can never get rid of it entirely (especially since the cause is biology), but we should always make sure it stays underground and as something illegal and shameful, because that at least prevents it from completely taking over the society. It's ultimately pointless to worry why men support or oppose something or to care about their logic in general, men always operate with misogynist logic, their strategy is always to gain power over women. Only thing that we can look at is the end result, and with "sex positive" values the results for women are catastrophic. Sexual liberation should've ended with the pill and accepting women to have normal sex lives, porn and prostitution and posting thirst trap pics on Instagram have nothing to do with normal, healthy human sexuality anymore. It's not about sexual puritanism but about privacy, sex should exist in private sphere and people should feel ashamed violating this privacy. But considering how much social media has destined the last shreds of people's sense of privacy, this will never happen.

I wouldn't be surprised if you are right and women will be pushed to accept sex work for welfare, there's already a widespread attitude that women can't be poor or have it bad because they can always just spread their legs to get ahead in life. OnlyFans makes this much worse, it's rapidly becoming expected that women should consider that as an option if they can't get other work. You don't even need state to force women into prostitution, as long as it becomes truly seen as "ordinary work" then women will be socially pressured to do it just like broke people are pressured to work in any shitty job like McDonalds or Amazon warehouses because if you don't, you deserve to starve. By the way, how do you define "late stage capitalism"? I see it as part of the "collapse fantasy" since it implies that capitalism is coming to and end and most people who use it seem to use it as cope.