Here is a mainstream article claiming that that much credit card debt isn't necessarily a bad thing. The author points out that "about 55% of borrowers repay their balances in full each month."
My dude. That means that nearly HALF of credit card holding Americans DON'T pay their bill in full, meaning they owe interest.
“While ... new delinquency rates have increased, the broad US credit picture is not alarming,”
Not sure how that's not alarming.
https://www.cnn.com/2024/02/25/economy/stocks-week-ahead-credit-not-alarming/index.html