It’s so great to see you here, Stephan! I’m glad you were able to offer your input.
Here’s my question though…
Going back to your free society with no copyright law…no CC licenses, right? So yes, someone couldn’t impose an SA…but at the same time, there would be no reason to…as no one could impose their own copyright (regardless of how restrictive) on any derivative work. So how exactly is the “free society” hypothetical an argument against SA? All SA does is push the world a little bit closer to a copyright-free existence…even if only in effect (and not in fact).
Much as I was saying in the Mises Wiki discussion linked above, when you say the share-alike provision is a “restriction on freedom” what you’re talking about is a restriction on the freedom to restrict freedom. In other words, you’re arguing that we believe so strongly in freedom, that it is important that others be free to restrict freedom all they want.
For me, the SA just makes it as if there were no copyright…even if it ironically, as you point out, uses the threat of copyright to “enforce” it. I do get where you’re coming from, and I have come around to your conclusion…but mostly due to the utilitarian part about being the least restrictive as possible. As far as “forcing” others to use “your” license with SA, I’m not really simpathetic to that argument, as I think it just makes it as if copyright didn’t exist…at least as far as that particular work is concerned. And I don’t really have a problem with that.