Utah is not an example that proves anything. It's a fairly unusual area when talking about this problem. Utah's entire population is less than Los Angeles.

The claim that 91% of Utah's homeless population was abated is somewhat suspicious, given the remaining 14k would mean they had a previous 155k+ - which outstrips the homeless count of most major cities (including Los Angeles). This is not as cut an dry as "make more housing" because that isn't demonstrated. Certainly not with numbers that are all over the place.