That is the main divergence between anarchists and communists. There is a good quote that captures the problem quite well (translated from German):

You say that the state is a tool that can be wrested from the capitalists, but if, just suppose, you want to be a small-time artist, what good does it do you to wrest the anvil from the blacksmith? You can’t juggle with anvils. The only thing you can do with an anvil is be a blacksmith. Remember: it’s not just the worker who sharpens the tool, the tool also sharpens the worker. The state may be a tool, but it’s not a Swiss Army knife, not a Leatherman, not a universal tool. And anyone who knows the stories—I deliberately use the plural here—will, given the problems of revolutionary states with the state, be unable to resist the suspicion that by attempting to take over power, one has already engaged so deeply with the logic of hierarchy that, if successful, one will almost inevitably imitate it rather than deconstruct it.

One idea of George Orwell about socialist revolutions he expressed when discussing animal farm:

I meant the moral to be that revolutions only effect a radical improvement when the masses are alert and know how to chuck out their leaders as soon as the latter have done their job

As soon as the revolutionaries have gotten rid of the capitalists they are a obstacle in the way of control by the workers as they have their own ideas on shaping a socialist society that they will try to push on the people.