Tanks aren’t obsolete for the single reason that in casual content they are the only ones who can effortlessly hold all agro and function without the other roles
In a dungeon a 1T3D is infinitely preferable to 1h3d and in a raid 4t4d is better than 4h4d
That’s our exact point where are you “busy keeping the party alive”, the tank is immortal in casual content and in savage you just fart out an oGCD and you’ll be at full by the next damage in 30 seconds