No I didn't ask if it's been that way, I asked if it would be op if they were allowed to stack. Then I asked for examples of how it could be over powered, while providing numbers to the best of my ability to show it is strong but I didn't think overpowered at low levels, but at higher levels it balanced out and was a utility tool but not exponentially overpowered.
The answer, thats the way we always do it is the worst answer because it has no value other than "someone told me so". no analysis of interactions or mechanics, just "it's that way because it's that way".