I kind of question the voluntariness of it though. Aside from the fact that a property right ancap society may not be completly voluntary (I won’t debate it here, I am just saying the left anarchists ,etc at least have an argument that it isn’t quite the case). You are still wishing to introduce as the main sociological text the notion of “natural elites”. That is where I think it is a problem. It is taking a subjective value system and building hierarchies off of it. So if it is voluntary, it is still kind of an indoctrinating and, I think, spurious text that you wish to use as the sociology of the ancap society.
Even if these “natural elites” are swell guys, if it is a well known and taught academic doctrine it could have negative consequences. In fact I argue it will most likely have negative consequences.