I do agree to an extent. Anarcho capitalism is perhaps more of a theoretical idea rather than a practical social structure. And it is not possible to uphold the NAP in an absolute sense – it is inevitable to cause aggression in some ways, through e.g. pollution or whatever. And private ownership of natural resources is, let's say tricky.
I am not an anarcho capitalist myself, but I believe society and interactions should be voluntary. But it is difficult to find a practical social structure where that is possible. I am actually rather pessimistic about people tbh, and our track record shows how bad we are at getting along and leaving people be.