It's a pragmatic thing. Similarly, sometimes I go through the imager knowing that the thing doesn't add any real security to my flight at all (so I decide to view it as a complicated piece of art in interaction between me and the TSA).
At the end of the day, I have to travel - I have a job (yay) that lets me work remote (yay), but that means cross-country fights on a monthly basis. If I opt out of flying, I also opt out of working for a rad nonprofit developing software that helps teachers share artifacts of practice. Skipping flying is an option, sure (I could get a job in SF, it's not that hard probably for someone with my background), but I've prioritized keeping my existing job over that.
Like it or not, we've structured an economy that requires people to fly. People should just be more aware of what they're giving up to make that happen.
My objection to the scanners isn't actually about the government spying on my butt. It's about how the general public is willing to let the government look at naked pictures of them without really thinking about the trade-off they are making. Lots of people don't even realize that there is a naked picture at all - if you talk to them, they think all that happens is an outline and a yellow box. If every time you go through the scanner you're aware of the deep violation of your privacy that the scanner represents, I'm okay with that.
So yeah, precheck is a cop-out. Long form performance art is a pain in the spied-upon nethers, so I'm closing the show. I'm still aware of the sacrifice of privacy we've all made, and I'll still work to make other people aware of it as well.