What is the advantage of having a few governments beside having no government at all (the only true Anarchy)? And wouldn't this advantage (provided there is one) work even further toward just one government?
It's not about having a few governments. It's saying people like you can have rulers if that's what you want.
The rest of us say that we want competing service providers to provide those services that the government currently claims a monopoly over, because we don't want rulers.
I am in for the only true Anarchy. Actually, any stateless society pretending to be an anarchy but forbidding implicitly or explicitly the true Anarchy would be nothing more than a fake, a state in disguise...