If you ignore the due process and evidence I guess. This is for when police would have been dispatched to a mental health emergency.
A first responder is dispatched and kidnaps them. Where is the due process or evidence? Appearing mentally ill or being impoverished is not a crime or evidence of mental illness. A first responder is not a psychiatrist or able to diagnose somebody in such an environment.
And they often lack the funds because of their severe mental illness that makes them unable to function properly in society. It’s hard to hold down a job (or even get one) when you think that everyone is a lizard person who is trying to take over the world and are laying eggs in peoples brains, because of severe mental illness.
And who could blame them for thinking that? These are people that see first-hand the horrors of society and capitalism, of drug abuse and addiction. You can be unemployable in the US for different reasons than severe mental illness, like having a criminal conviction. Should they receive treatment for their delusions if it is imminently harming themselves or others, they are violent, or have committed a crime? Yes, it would likely be appropriate.
There are people that literally cannot take care of themselves due to mental illness. No matter how many services you offer them, it’s just more services that they won’t use. If the option is commit them and take care of them, or let them die, you’re saying let them die.
If they are a threat to themselves and others, have committed a crime, or are actively violent, they should be given due process and treatment they consent to prior to involuntary treatment.
I’ll ask again - if a homeless severely, severely mentally ill person refuses all help, what do you suggest the government do?
I've answered this in abundance. Re-read. It is the job of society and everybody in it to create a world that is less traumatizing, that is less exploitative, that nurtures every one of its members and helps them to unleash their potential. For individuals experiencing psychosis who are not violent, they should be given the option of an environment similar to a Soteria House.
The state of New York could buy these homes and use them to re-home individuals placed into them or repurpose them. Or build new, affordable housing.
Are you seriously arguing for renting and no social safety net? If rent was affordable and fair, it'd be another story.