Some are prepared to compromise and live within their means to avoid debt whilst others aren’t
And some people don't have sufficient means to avoid debt, even for essentials.
Debt isn't always necessarily bad, expensive, or avoidable.
We all have to live somewhere, and mortgages often cost less than renting, plus you own the property at the end of the mortgage.
Student debt usually leads to a better paid career, and under the current system, most people don't have to pay all the debt back before it's wiped, and if you're on a low income, you don't have to pay anything at all.
And unless you're being completely reckless, I don't see the problem with getting interest free credit for household essentials like washing machines. Obviously it would be nice to pay for these things out of savings, but not everyone has much spare money, especially when they're starting out. We still have the fridge freezer we got on interest free credit in the 1990s, so it's not like we've been profligate with our household appliance buying habits.