Is it ignorant to claim that all homeless people are homeless because they choose to be?

I live in a small town when the homeless problem has gotten really bad starting about 10 years ago. Whenever my mom drives by a homeless person, she's like "fucking bums, get a job. I don't feel sorry for all of them" when I say that not all of them choose homelessness, she's like "yes they do. There are places they can go to get help".

Is it ignorant to claim that all homeless people are homeless because they choose to be?
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