Because saying "If torb's turret slowed he'd be a support" is focusing on all their other abilities?
No, that's narrowly taking ONE part of his kit, and claiming something silly since Symmetra's turrets alone don't do much damage, and they die in one shot, meanwhile Torb's turret actually does decent damage and can't be killed in one shot (Also can be repaired).
Except she was OP then, her shielding was tuned back, and then they made it even better than it was after the nerf, but more balanced due to it being an ult now.
And so? Roadhog doesn't even have a barrier, is he suddenly not a tank at all?