Does that not lead to the equally toxic situation of tank soloing
Right now in casual content there is no check on tank power. DPS lack adequate sustain to singularly keep themselves alive and healers keeping themselves alive tanks their DPS potential. Tanks meanwhile have no restrictions on either side which leads to how often tanks will solo a boss
If tanks are going to “shine” in single target sustain yo the point they can out sustain the damage being done to them they need to be checked in some other way because right now the only check in tanks power is the enrage on savage content that forces DPS (at least while its current)