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You're misunderstanding the point of credit cards. They are not about borrowing from the bank (well, they could be but they should not be). They are all about convenience.
I use credit cards. I never ever had a balance on any of them -- I pay them off each month. It is convenient (and pretty much necessary for certain things like renting cars) and I do not borrow anything. I don't have slippery-slope problems with respect to buying "on credit". Oh, and at least in the US finding a credit card with decent rewards (typically, 1-2% of your purchases refunded to you) is not hard.
But bear in mind that some other people might. If DeVliegenderHollander suspects he may be one, then avoiding credit cards could be a very sensible move for him.