Are we an Emergency Service? No - we are not. That is what part 90 is for.
We are hobbyist, enthusiasts that practice the radio art and sciences. As such, we develop the skills and methods to make things work, when all else fails.
We fill in, when asked, when established systems fail. We are not a "First Responder" that jumps into any and every situation with our "magic" HTs to save the day.
If you want to be part of an EmComm organization, join one - they have their own radio service under part 90 rules. They use encryption there - and it works well.
Thankfully, the public communications community has noticed when things have gone bad and we've stepped in to help. They've evolved their systems to be more robust and survive events. No, they're not perfect and there will be opportunity to help out in the future. But, we provide that help out of civic duty. Not as an EmComm service.
Allowing encryption on the Amateur Bands will further dilute the separation between our hobbyest, experimental service and established EmComm services. When those EmComm service start asking for more bandwidth to support their growth - where do you think they're going to look? If we're already providing EmComm services - predeployed, dedicated, secure encrypted, agency specific communications - what shouldn't they have our bands?