>Everyone I know, me included, just uses debit cards for purchases everywhere including Amazon.
This is just as anecdotal as GP or indeed myself. I never use a debit card and don't know anybody that uses them other than for getting cash out of an ATM
How old are you? People using credit cards in my circle (early 30s, London) are firmly the minority. If we split a bill in a restaurant it's all debit cards. Maybe there's one person with an amex or something.
Do you check everyone's card when you split the bill? What makes you think the others are debit rather than credit cards?
For info: the debit & credit cards from my bank look almost identical. The only difference is one says "credit" in small black text. My credit card handles exactly like my debit card in terms of tap-and-pay etc. I just wouldn't use it to take out cash from an ATM, but then I can't remember when I last needed to do that.
This is just as anecdotal as GP or indeed myself. I never use a debit card and don't know anybody that uses them other than for getting cash out of an ATM