no longer hashers have to run bitcoin software and govern Bitcoin network instead they just point their hashing power to pools and delegate their enforcement power to small group of people, and that makes that hashing power useless in terms of securing Bitcoin network.
Yes, I see your point. I agree. Miners are trying to get the best reward for their work, pools can help achieve this. But it was bitcoin that offered this reward and encourage miners to chase it.
There is a clear distinction between Miners and Hashers. Miners verify validity of transactions and blocks according to Bitcoin protocol but Hashers do no such thing they are happy to hash anything while looking for magic number. I would like people to understand it because that will help to get the message out.