There is theory, and there is praxis. Theory is understanding that the mechanisms of the state are not on your side - that they can and will be used against you when you try to make a positive change.
Praxis is recognizing that while all of that is true, the mechanisms of state can also be used against some of your enemies, and that it is probably a good thing that these dangerous people are not free to do as they please.
I dunno, then we might get flooded with people far to our left. You know, since Biden has the most progressive policy ever.