Kids can access the internet in all kinds of places outside the home, and outside the purview of their parents supervision. Schools, libraries, friend's houses, public wifi anywhere.

You may be right about the authoritarianism; it's a tendency of our species and makes it all the more remarkable that Western freedoms have lasted this long. I think, though, that it's more likely simple greed. The giant tech companies, dependent on ad revenue because nobody would actually pay for what they are offering, must be able to track and profile people.

The "protect kids from porn" lobby has always been around, it has nothing to do with surveillance or the internet. These people would be picketing a bookstore that sold Hustler magazine back in the 1970s, and demanding that customers be made to prove their age.