The difference between using the current system and using AI is, one is going to cause false hits on innocent people and prone to make life taking mistakes, the other is run by AI.
I don't see how using AI is somehow going to be worse than the current system of requiring people to be constantly ID'd. I view it like self driving cars. It's not hard for AI to beat human errors. I think that if we can limit the need for officers to be in contact with people then we limit the problem of officers making mistakes or infuriating a situation that would have never happened if they didn't show up. This would save money and reduce the chain of people who could make a mistake.
My guess is these groups don't want to see the current system get fixed. Body cams reduce corruption and increase transparency, taser's save lives, AI will cut out the middle man who is "only human".