I shot a Hoyt Gold Medalist for several years at 87#. They were the heaviest set of limbs that Hoyt ever made for the GM. They wouldn't guarantee them. After about 4-5 years they warped. Sent them back to Hoyt and Earl steamed them back to straight. But it took them down to 67#. I have been stuck in the 63 to 70 pound range for 15 years or so. Fianlly old age and a bad back have forced me down to 57#. The higher poundage cleans up a poor release and the extra arrow speed will get you through some lower windows. Is poundage over 45# needed? Not really. But if you can handle it well, then use it.
I suspect that we will all agree that shooting the poundage that you shoot best is the most ethical poundage.