How much of that hash rate is pooled? What happens when a pool goes against contributor wishes? What's stopping other miners from coming online? Bitcoin is censorship resistant
What do you mean “against contributor wishes?” Many of the miners couldn’t care less about block template construction and are only interested in fiat gains. Many hashers have no “wishes.”
If pool censorship started threatening one of bitcoins core value props, effecting adoption, hashers would care. Economic incentives are the only incentives worth relying on.