The idea in the spec that default behaviour should be "please track me" seems dumb. I know it's technically more "I don't mind if you do," but the history of the web thus far makes it pretty clear that that's how it should be interpreted. To spin any alternative to this as "reducing user choice" is ludicrous.
I presume the defaults are really that way in order to preemptively placate the advertising industry, but I wish they were honest about that.
But whatever, I have zero faith in "voluntary compliance" with this stuff. Or government mandated compliance, for that matter.
Technologists have to be bold and accept that tracking is basically always dangerous and a bad idea, and design systems around that. It sucks that at present it's only technically savvy people who can protect themselves reasonably, and no amount of voluntary good behaviour by industries who are so morally dubious, and derive their income from tracking, is going to change that.