That's like asking "what does rent have to do with property prices?". Just because you've managed to be on the top of this perverse social summation of usury doesn't mean it isn't predatory and a net negative for society.

Credit cards are one of the most insidious ways that banks extract money from those living closest to the margins of poverty. The benefits you gain are a fraction of the profits gained from raking the most vulnerable over the coals of bankruptcy. They're a financial instrument of torture and I refuse to have anything to do with them. I'm not by any means rich, but I'm 48 years old, have zero debt, and will spend the rest of my life avoiding debt.

Finance is not a zero sum game.

Morally, they're also quite problematic, imo. Even if you aren't paying interest because you pay off the balance every month, CC companies can only offer points and cash back and all of that other stuff on the backs of the customers who aren't able to pay it off every month. It's a subsidy of the financially illiterate to those who are. If the predatory 20%+ interest rates were banned, the points and rewards programs would disappear overnight.

I know this isn't popular in the USA, but when compared to the rest of the western world, consumer debt is off the charts insane in America and it doesn't have to be that way. I've lived on both sides of the pond and I much prefer a society where people buy things that they can afford instead of financing everything on the back of a hope and dream that they will for sure pay off the balance this month.

As for the "but muh security!!" argument that I can hear someone typing, having a credit card for security is a terrible argument. You should be lobbying your politicians to regulate financial institutions to build better systems that are not susceptible to such obvious exploits and fraud. Again, much of the world has solved this problem to the point where I can post my bank account number on my business website and nothing bad ever happens. Customers can wire me money directly without approval and I have to manually approve all outgoing transactions at least once (scheduled transfers are still possible); it's not rocket science!