Why do you disagree? Just because others keep them lower? I stated that lower is always better, but the fact of the matter is: It is still safe to run your GPU @ 90 C.
I like to keep mine below 80 C. Your disagreement does not make any sense, since you do not state any reasons. GPUs are made to run hot... Better to keep them cool though.
Just my personal risk tolerance. I would not personally be comfortable with my cards between 85C and 90C for very long (not for safety reasons, but for GPU life/wear and tear).
Yes, you said lower is always better (and we both agree on that), but I wanted to let the OP know that there are many of us that wouldn't take a "Nah should be fine..." attitude with 90C temps.