>Why have you let the state occupy your property?
This doesn't have anything to do with the original question. No matter how much you repeat "might makes right", that still doesn't make anything done with the threat of violence "consensual", unless you want to tell me that rape at gunpoint is consensual, in which case I would question whether your definition of consent is really useful at all.
From a moral standpoint, if everyone were to behave as you say--that if libertarians should not worry about taxes because they are "consensual" under your "might makes right" doctrine, then you should not worry about any sort of global elite, the government, Google, The Jews, etc. because after all, "might makes right". In fact, you would not logically be able to complain about anything in the world that is out of your control, because "might makes right".
From a utilitarian standpoint, capitalism isn't a "might makes right" economic system. The inefficiencies of states manifest due to their inherent nature of using violence to act against people's natural preferences.