You have a relationship; creation of the relationship was enabled if not formed when you signed the card agreement and agreed that your debt could be sold, transferred, or exchanged to or with a third party. If you thought that was unethical, you should have redlined it at the time.
And then the credit card company would have told me to piss right off, and I'd be struggling to live in American society without credit cards or a credit score.
I was just in line at the grocery where an elderly couple bought $600 worth of groceries and paid by check. I wasn't even sure stores still took checks.