How does transport time relate to not treating pain? Unless you are doing all of your treatment enroute, you have time to relieve the pain. If you don't think you need to treat pain, then you don't need to have ALS providers either.
This is total, unadulterated CRAP. This philosophy has been widely disproven, and should not be used to limit pain relief options.
If they don't like change they should get out of medicine altogether. Morphine has been used for so long that people don't want to have to think about whether it is effective or not. Fentanyl is a much better drug for this effect, and a good many places are already using it as an alternative rather than a replacement.