I've honestly never heard anyone shouting back and forth one way or another about it in such absolute terms... so maybe it has to do with clinical culture/teaching hospital culture. People have been pretty middle of the road as far as I've seen. The way I've seen it used is generally in combo with other things, for animals with liver/kidney/GI issues/on steroids/dehydration, or on a PRN basis for something that may or may not need analgesics.
I mean, if the pet is doing clinically well on tram, I don't really care how "well" it's working. If pet is not doing clinically well, I'm not going to insist that tram should be enough because it's the best drug ever. It's not like you have to pick one drug and one drug only and stick to it.
The only clients who swear by it and think their large dog can't live without it are the ones that also call frantically in the middle of the night that their dog ran out, claim they accidentally trashed/lost it, and call for refills exactly on the dot each month.... so you know... if it were up to these people, it's the best drug on the planet... but I digress.