That's the biggest issue. The police aren't the correct solution, at least in their current form, but there are no other solutions. Is it worth it to unfairly limit one person's life in order to protect them and people around them from a short period of harmful behaviour? If that limitation was temporary, yes. But it isn't temporary. Being arrested and having a minor possession charge that will be erased after five years without the person re-offending wouldn't be as bad.
> Is it worth it to unfairly limit one person's life in order to protect them and people around them from a short period of harmful behaviour? If that limitation was temporary, yes
I think the question turns on scale. If one person has the capacity to harm dozens, as one does in a city, the calculus may shift towards incapacitation. If it’s a small handful of non-violent interactions, on the other hand, as would be more likely somewhere less dense, then I agree with you. (Same turn on access to weapons.)