They don't care about porn. The people who would vote for it in Utah do, and that's why Utah is being used as a vehicle by other people to bolster the need to root all computers.
The government demonstrably has the ability to break into your comms and data without going through any of this. Instead of a libertarian conspiracy theory have you considered that politicians chase power and re-election?
Taking a stand and making major changes is hard to pull off, costs a lot of political resources, and can backfire horribly. Doing symbolic, popular crap that’s popular with the (admittedly thick and ignorant) majority is an easy win. Moral outrage is an easy win. “Think of the children” is an easy win.
Ed: Corrected “comma” to “comms”
For years now Americans vote by party, not politician
You’re also missing the entire dimension of primaries in which there’s intra-party competition. Honestly you’re missing more or less everything.