> You're right. But is a 30-year-old who moves back in with their parents "homeless"?

No, but this is also not ideal for many reasons

I have a friend going through this right now, actually. The biggest challenge is that her parents don't live anywhere near a strong job market. So the decision for her is "be homeless in a place where jobs are available" or "have a home but no access to employers"

It's not ideal

I have been applying since March 2020 out of New Orleans and I have come up with nothing (5-6 first round interviews) so I think that this is a much bigger problem than people think.