People haven't traditionally cared about privacy when it comes time to US elections either, it's definitely not a single-issue voter issue like abortion, gun ownership, welfare, etc.

So I propose a dictatorship of HN commenters ;)

The change is already happening: People don't care about privacy that much anymore.

Any regulation introduced, would be to stop this change. But it will never work, you can't make people care about privacy through regulations.

So your point is that people must care about it, and if they don't it doesn't matter because we'll take away Facebook anyway?

If we went by majority and popular opinion all the time there would still be slavery, segregation would still be a thing, same-sex marriages would be illegal, there would be no abortion rights and so and so forth.

I'm not sure about this. At least for the same-sex marriage, seems that majority in US approves it in recent years. I don't think a regulation can or should make that kind of change while like 80% people don't agree with it.