The question was whether taxes are taken at the point of a gun and whether one can opt out of the "social contract" without govt threatening and using force.

Yes, different places have different "social contracts", which results in police using force in different situations. Those differences don't mean that "social contracts" are voluntary in some places and not in others - they're all imposed by force.

Yes, the circumstances in which police will point guns at you vary.

That doesn't address