We live in a debt based financial system. many of people's major purchases require a loan unless they have the cash to pay outright, most notably vehicles and houses. Unless you have 300k just sittin around then you need a backer.
It is a hustle tho. However, the only thing these companies are exploiting is our desire to prove how independent we are, and to show the acquisition of material goods as a status symbol. For example, there's no reason why two or three families couldn't get together and put up a 60% down payment on a 5-6 bdrm mini mansion
The house could be paid off rather quickly, and then other families could save up for their own spots. In some cultures you have multigenerational families. There are all types of ways to build credit without going into serious debt, but we don't really hear about them til it's too late, and they don't teach Finance 101 in high school when it would be useful.