alt Hacker News> US HUD says it's ~16% of homeless people, other sources give different numbers, but it's certainly not a majority
"Homeless people" is a broad category that includes people temporarily living in vehicles, bouncing between family members, or sleeping on a friend's couch. It also includes people who are about to lose their home, young people living alone.
But when everyday people use the term, they usually mean, specifically, visible homeless people - i.e. people who are homeless long-term, sleeping rough on the streets or in parks, etc.
The two groups are pretty different to each other. I would be very surprised if the rate of drug addiction in the second group was the same as the rate of drug addiction in the first group
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> I would be very surprised if the rate of drug addiction in the second group was the same as the rate of drug addiction in the first group
But that's a far far weaker claim than the one above.
If the rate is 90% or higher in the second group, then we get close to the claim being true. (Though still a subset rather than the circles being the same; lots of people with drug problems have homes.)
The people you think are "temporarily" living in vehicles are not doing so temporarily.