> He has a point that in a society with strong legal protections on freedom of expression, copyright is one of the main tools the state has to stop expression that is deleterious to the ruling class.

If the State wishes to prevent expression that is deleterious to the ruling class, it will simply not strongly protect freedom of expression. "Legal protection" isn't an exogenous factor that the State responds to, it is a description of the actions of the State.

Of course; I don't think anybody disputes that.

But the political cover of "but think of the poor artists!" is used as a cudgel for situations where "we prefer to censor Bob!" is unpalatable.