I know the OSA is bad, but this libertarian attitude American tech has of we can operate anywhere in the world and not care about its laws because we're American is genuinely quire harmful.

I honestly have pretty mixed feelings on the OSA, I think government regulation of social media is actually pretty necessary as these sites have shown they can't or won't regulate themselves. But the OSA is pretty clearly not about user safety, the Times even quotes the government as saying:

First, we are told, the relevant secretary of state (Michelle Donelan) expressed “concern” that the legislation might whack sites such as Amazon instead of Pornhub. In response, officials explained that the regulation in question was “not primarily aimed at … the protection of children”, but was about regulating “services that have a significant influence over public discourse”, a phrase that rather gives away the political thinking behind the act.