Everything changes, even something as staid as law enforcement. As with every other industry you have to be flexible enough to roll with the times - even if you believe the changes are objectionable or counter-productive. If you don't like what will happen then put in the work to adapt, be part of the change process yourself, and/or educate those who are forcing the change on you. Like it or not change is now in the wind, and if anyone is willing to simply walk away from their career you've got to wonder just how adaptable and flexible that person was to begin with.
There are lots of historical examples of change both large and small forced on many different organizations and industries, and every one where the people successfully adapted made things much better as a result. It all comes down to this simple Darwinism: Evolve or die.
It's not that easy. Change needs to happen on both sides. But not everyone agrees with that. They want things to be one sided.
The self perpetuated downward spiral has been happening for far too long. The change needs to start there.