Let's compare two scenarios:
1. I live in a village. I buy flour on credit from the miller, because I lack funds and they know I'll be able to pay them back after I sell my own textile goods at market.
2. I travel overseas to a store I've never seen before and I will never see again. I transact $100 on my credit-card purely because my debit card won't work for some reason. I leave with the goods, reminding myself to pay off the balance ASAP with funds I already possess when I get back to the hotel and a laptop.
Technically they both involve "credit", but it's not really equivalent. The first case involves a direct relationship in a community, while the second is indirect, a stranger trusting my card-company. In the first, incurring a debt is an intended feature, in the second the temporary debt is just a weird inconvenient quirk that I'd rather skip entirely because it makes more work for me.
In short, just because someone uses a credit card doesn't necessarily mean it's "credit" in the anthropological sense.
I mean fair enough but we were already talking about credit cards, not villagers.
You said (emphasis added):
> We should be careful to distinguish when credit-cards are used for credit purposes versus the common scenario where they're just the default/convenient payment method and a debit-card could substitute just fine.
So it wasn't about "credit" in the anthropological sense, as credit cards are never used in such a way. Unless you are going to suggest there is some bifurcated way of using credit cards where one offers a more "direct relationship to my community". In short, my misread wasn't as you indicated - about failing to misunderstand something about credit cards. Rather it was conflating a general sense of "credit" (such as credit cards) with what they had meant, "I'm talking about "credit" in the David Graeber sense, where people effectively just remember who has done good things for them and reciprocate, not in the modern sense of credit cards and bank accounts." - which is what you term the "anthropological sense".
So I appreciate the nudge in the right direction, but I hope you see my point given what you actually conveyed. Thanks, have a good day!