I agree that it's stupid to finance everything.

However some big things make sense to finance.

Take your car example: I'm not rich enough to buy a car that won't break down every year (I know, I tried).

However, when my car breaks down, I can't go to my clients and I lose money.

In this case, it makes sense to rent out a car that's going to be working properly, and with guarantees in case it doesn't.

However yes, I wouldn't buy a toaster in multiple payments...