Why don't homeless people use camping gear?

People who go camping are basically homeless for a while.
Update: @life's a beach in a backpack perhaps? Just like backpackers...
Update 2: @C T M they receive unemployment benefits and you say camping gear can cost thousands of dollars but it doesn't have to. There's budget options as well.
Update 3: @Bookbinder who sets up in a city while you can wildcamp just outside the city?
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