I was taught very early in life, "let the buyer beware". Did I make some stupid decisions buying stuff on 'easy credit' when I was young anyway? You betcha. But I learned from the experience and made better decisions as I got older. That's the way it's supposed to work.
What's your alternative? Provide a 'nanny' for everybody?
I agree that sometimes experience is the best teacher. The schools could still do better at teaching math-especially applied math, not just abstract math.