Most survival work like that doesn't pay that well, so you would not be able to get shelter, food etc anyway.

A large majority of professional jobs in business, programming, accountancy, consultancy are filled with people who want to be there.

I am in a professional job, and I doubt I could afford a decent place to live without parental help other than a crappy flat in a dodgy area.

How people afford to live by themselves, on non-professional jobs I don't know.