Forks introduce chaos and are sometimes impossible. If WordPress had a different government structure from the beginning Matt would not be in power anymore, but because it's a dictator for life he's still there and the community has decided to put up with him rather than risk the chaos of a fork.
No one is happy about it, but collective action is hard when it's not baked into the system.
So it's more like herding cats instead of nuking everyone that decides to ignore the presidencial orders or not paying taxes.