Quite a lot of Richard Stallman's arguments are pure rhetoric, actually. And, I mean, I guess it worked, in that the GPL and FSF ended up being quite influential; but the trouble with building a philosophy on rhetoric is that people start to believe that rhetoric – including you –, and it erodes and replaces the foundations of their beliefs, so it'll all come crashing down sooner or later.
I don't really think we need to engage with the rhetoric on an intellectual level, since it's obviously wrong: far better to read philosophers whose reasoning is sound, or to come up with your own ideas.