What junk? Works same as a debt card but just not directly tied to a checking account, so less a big deal if it is lost or false charges made on it with companies reversing it. Get cashback on purchases, additional warranty on items, and able to do charge backs if company isn't giving you a refund for whatever reason.

Most people who run into trouble are because they don't realize credit cards aren't free money so go beyond their budget. If you spend what you can afford and pay back each month question becomes more why should a debit card be used over a credit card?