If they have the majority mining power they could equally well undermine the security of the original branch, rendering it worthless as well. Miners have intere

If they have the majority mining power they could equally well undermine the security of the original branch, rendering it worthless as well. Miners have interests, core developers have interests, bitcoin users have all kinds of interests, none of them on their own decides what will happen. Without miners there is no bitcoin, but neither is there without developers or without users. Would you feel safe having your savings stored in the original bitcoin fork, knowing there is a mining cartel that holds 50% mining power? Some users will accept reasonable changes that weere lobbied for by the miners, if that means they get to enjoy the security provided by the miners.