Yes, Regan fucked up. Yes we need to rebuild the mental institution systems and we should be spending a hell of a lot of tax payer money to ensure those institutions serve their populations in a humane manner. Most homeless have mental health issues and the US has very little resources for these people. Drug rehab facilities should be free to users and well funded by taxpayers, as should all healthcare.
Saying that homelessness is entirely due to housing shortage is not seeing the forest through the trees.
He must not be very intelligent to hold these debunked and outdated views. Quite out of touch with reality.