What I have heard denying self-ownership usually sounds like flat-earther denial of curvature. "If I refuse to acknowledge it, it doesn't exist, even if the mere fact that I am trying to present a dissent necessarily suggests at least self-ownership of intellect." Maybe there are better arguments out there

As for the Fed and fiat, their argument would hold up better if they weren't also out to tax crypto and destroy projects like the NORFED dollar where people developed voluntary alternatives.