1- Hatred? In my whole career as healer I've never met any tank that had that kind of hatred and knowing how hugbox this community is towards less skilled players that doesnt seem to fit, either way vote kick is a thing and any class shouldn't ever be changed due to a very very low populated minority of douchebags
2-You dont tell me what class to play because I could easily say to you that "for those healers that only want to heal I recommend you to go play WoW", as a healer I also enjoy healing and knowing that party lifes are in my hand but that's only 20% as MUCH of the time because how the damage is so... What do healers do in the 80% of the time? I dont know you but I dps and help the party and seeing how the thing that I do in the 80% of my time is being dumbed to the point that its not fun doesnt make me happy, and guess what? the fact that I'm unhappy about the changes doesnt make me less healer.
3-The fact that youre excited for making dps as a tank shows a little bit of hypocrisy, Using your own same logic I could say "doing dps is not tank's job, they should only grab the aggro and be the shield of the party, If you enjoy DPSing I reecomend you to play strictly DPS as clearly is what you enjoy doing"