I may or may not agree with PoS, but I don't have anything against people voluntarily entering or leaving those networks. The US Dollar is a bit of a stretch. Not an open permissionless system that anyone can just fork or leave. All other currencies are beholden to the US dollar too via force.

PoW is not flawless and neither is resistance to hardforks. There is no immutable law of the universe that prevents majority of BTCs increasingly diluted users (normies) from moving to more compliant and captured Bitcoin forks in the future, i.e. because it is regulatory friendly, and taking most of BTCs hashpower and value with them.