god, it’s so tiring. These people legitimately believe that natural monopolies never exist and the only monopolies are created by the government. It’s so fucking tiring and just impossible to argue with someone when all of their points are just so wrong. I can post some of their worst offenders if anyone wants to see them.
Pretend to be an extreme market socialist who leans very heavily on the market side. That sometimes gets through to them, and the rest of the time it's funny.
That is, capital ownership only exists because of government intervention in the market. Tenants have to pay rent because of a piece of paper in a drawer somewhere saying the police will come help evict them. Workers can't just use the capital for themselves and tell the owners to fuck off because of more government intervention. Any business that's not a coop is the result of a government intervention in the market that violates the NAP.
They'll probably go for the private army line of reasoning, but if that army is a coop too then you're just coming up with a funny name for community defense.