I think they neither understand how authoritarean states manage to stay in power, nor how even discounting that you’d need some paragon of socialist virtue at the top to give that up.

What I mean by the first line is that even if your leader genuinely wants to dissolve the state eventually, they can’t stay in power without surrounding themselves with people that are both power hungry and stupid, so dissolving the state would fail on account of those people. I guess maybe they believe it’s realistic to also have all those people have genuine intentions, but it’s just not.