In an economy where skill (supposedly) correlates to income, income is expected to increase across a lifetime.

Therefore 25 year-old me borrowing excess income from 45 year-old me is a good thing, purely egotistically.

Furthermore lack of debt means every big purchase is preceded by hoarding. No matter which way you look at it this is bad for society. If I had 50k€ laying around it would be much more efficient resource-wise to lend it to my neighbor so they can build up their business, than to keep the money under my mattress and tell them to tighten their belt for another five years. They get a business, I get a bit more money in the end, everyone is richer and the economy is stronger.

Economics are not a zero-sum game. This belief that "if someone is making money then someone else is getting robbed" is deeply damaging, especially as it seems to be the main economic driver for Trump's batshit insane administration.

Debt is good. Predatory practices are not. That is what regulations are supposed to curtail. Where I live "credit scores" are not a thing, banks only loan to you based on proof of income, a declaration of open credit lines, and your civil status (age, partnership status, dependent people). Racism and sexism are of course an issue, although if caught the banks face big fines. But it's not like American credit scores are colorblind...