It seems like an analysis of the capabilities of anarchist/communist societies through the lens of liberalism/capitalism. I can't see that argument as anything but bad faith.
I know governments intentionally inject absurd arguments into leftist communities in order to discourage hope for anything better than what we have. Maybe it's nothing more than that. Primitivism, to me, looks like people just throwing their hands up and saying only capitalism works if we are to have a standard of living that is acceptable to most people.
I don't really talk to many leftists about theory, though, despite considering myself a leftist. I know it's important but it often feels like a minefield and I think people get bogged down in details but real life isn't just theory. We can have an amazing concept of the future, but we are still going to have to adapt to realities as they unfold. I'm sure my ignorance of leftist thought is showing...