First, if we assume Stallman is human, we have to grant he will not be right about everything (impossible on logical grounds and supported by the fact that he publicly changed his views on certain things in the past).

Second, when it comes to action, he only argues that copyright should have reduced power, which we can all agree with; he does not appear to argue for the death of copyright. Death of copyright would seem counter-productive, unless it also implied the death of corporate ability to withhold the source from the users and many other things.

You will note that the very text you linked to is copyrighted. There’s a reason for that.