And this is fucking up things big time on this planet, and maybe it's high time for it to stop.
A lot of the problems you described have nothing to do with privacy, and are entirely because general population is bunch of hypocritical children. They get scandalized. It's a hallmark of a mature person that they don't get scandalized over things, but that they seek understanding instead.
If anything, sudden and total lack of privacy would show everyone just how hypocritical people are. How many of those against sodomy laws visit prostitutes? How many of those against prostitution are homosexual? Not saying that either is wrong - my point is that what privacy does is it creates power asymmetry. I can shame you all day long for your "sins" and you can't fight back because you don't know about mine. I'm not really convinced that the solution to this problem is more privacy.
Yes, telling people to grow up is a tall order, but I hope that as a civilization, we can reach it. And then, privacy will be something that isn't really needed much, and enforcing it only makes things less efficient.
That, and of course total impossibility of getting back the pre-industrial privacy levels while retaining XXI century technology.
