Lets suppose sexual liberation is "bad" for society as a whole. Ok, but a lot of things could be argued to be "bad" for society as a whole.

I could make an argument that ending slavery was "bad" for society as a whole, afterall entire civilizations were built because of slaves. I could make an argument that gays should be persecuted because homosexuality is "bad" for society as a whole (how dare they be gay when they should be having kids! Look at the low birth rates!!) I could make an argument that complete dictatorship is the only good system for society as a whole.

The question is why the fuck should we sacrifice ourselves for society? What is "society"? If you're not working for yourself, who are you working for? Religion? Nationalism? The elites?

I suppose we could educate people about the potential consequences of their actions and make them more self-aware and I agree with that, but even then a lot of peopel would put their personal morals ABOVE what could be for "the greater good", this is just how humans are. You could argue immigrants are weakening the country but it won't stop the leftists from believing the opposite based on their morals and the only way to silence them would be to persecute them (!) or abandon the concept of democracy as a whole (yay for dictatorship, I guess...)

You can't stop people from having sex unless you use silly religions to suppress their sexualities and threaten them with hell or whatever.

In the end, educating people is good and all (The Red Pill doesn't count, it's about getting laid and it's not objective), but limiting their personal freedoms over some misguided notion of the "greater good"? Meh...