miners are sufficiently smart to recognize that they don't want to be part of a mining poole that acts so recklessly and takes stupid and unjustifiable positions.
You write as though you are under the impression that more than 10% of Antpool's hash rate isn't owned by a single business.
What one miner decides is what 90+% of Antpool's mining power will do. And I'd bet on 90% of the stuff he DOESN'T own just sucking along for the ride.
I claim no knowledge of the details in regards to the extent of Antipool's centralized control over their mining power and the extent to which their business model depends upon independent miners.
And, hopefully, there remains sufficient competition in this mining space in order that stupid miners with destructive ideologies can be priced out of the market when mining either pooles away from them or others begin to mine in order to take away some of the hashing power of the stupid miners that take apparent bitcoin destructive positions.