I’m not a fan of all or nothing, I think there’s a place for a well trained police force. Look at Europe and the UK, they aren’t armed, but they have power still. Someone has to take care of the person who stole a car and is speeding down the freeway going 100+, crisis councilors aren’t going to be driving trying to perform a PIT maneuver.
I think it’s a blend, in my example the police would bring them into custody, and then trained people work with them after that working out what happened and working with the justice department. There are many things that police aren’t needed at, like domestic issues, but there are plenty we do need them at too. (However, reforming the police needs to happen, I’m not saying they are perfect right now.)