That's just it, he spoke about free software, not these larger issues. And getting people to adopt free software is an orthogonal issue.
Even if GPL software had 99% market share in the US, and everyone in the country were running the same kind of computer as Stallman, the government could still step in and pass all kinds of draconian laws.
Getting regular people to adopt the GPL ethos is fine, but if the ethos doesn't permeate government as well, Stallman might as well be touring around promoting the Spice Girls for all governments will be prevented from doing intrusive things.