You don’t make money having a debt. You’re still accruing interest to pay. I think another way to think about it is that the lender is not making a profit when

You don’t make money having a debt. You’re still accruing interest to pay. I think another way to think about it is that the lender is not making a profit when inflation is factored in. It’s a bad deal for them and a good deal for you. Additionally if you invest the debt into something that beats your loan’s interest rate then you’ll make money, which is more likely now, since any worthwhile investment would have a rate at least inflation (for example, I-bonds).