And, if no one bought cars on finance, there would be virtually no cars.
Generally only companies could afford new cars outright.
Fewer new cars, equals fewer used cars.
Fewer used cars means higher demand.
Higher demand means higher prices for used cars, and we're back to people not being able to afford them.
You could say don't borrow money to buy a house, look at how much interest you're paying there.
Yes it's appreciating, but so has one of my cars.
And my other hasn't depreciated from what I paid yet.
Tl;Dr
Your choice to borrow money, so long as you have the means to repay, it's YOUR choice.