This is entirely correct for some subset of the homeless population. Some people are far gone enough through untreated mental illness or drug addiction to where

This is entirely correct for some subset of the homeless population. Some people are far gone enough through untreated mental illness or drug addiction to where they can no longer be reasonably classified as being sound of mind, they're no longer able to take care of themselves even at a basic level. These people need professional help even if they don't nominally consent. To let them slowly languish and degrade further mentally and physically on the street is not compassionate, it is grotesque. Obviously, that's not all homeless people, but it's maybe the most visible segment of the population.