No it’s just we are at the point of healer CD’s (especially on SCH/SGE) where the tanks performance is functionally irreverent to your own healing plan because the tank can be a paper thin zero mitigator and it shouldn’t matter because you have so many CD’s to mitigate this problem
If your tank is good you are irrelevant, if your tank is bad it doesn’t matter because you have so many CD’s to mitigate it. In high level content if you are relying on the tank to be decent to not completely come apart at the seams you are doing something wrong