I don't think anyone is really refusing it's just they don't like this type of design where a tank basically just feels like a dps that happens to have the mob's attention. Almost everything about reducing damage is passive or is just press cooldown when you see big cast bar. Look at the converse, imagine raids were designed so that dps classes had to build for mitigation, and had to use a more defensive stance for 80% of the fight. I think dps would be rightly saying "I didn't sign up to tank I signed up to dps." People can call me a role purist but I think the design of content should be such that each role focuses on maximizing it's role. Dps should maximize dps, healers should maximize healing, and tanks should maximize mitigation.
