My guess - people think it is fooling unsophisticated customers into making poor financial choices and buying things they should know they can't afford.

But I'm with you, I don't see it as a big deal. I routinely take advantage of the 'no interest installment plan' for my Apple toy purchases on my Apple card. Why wouldn't I want to hold off on giving them my money for as long as possible, especially in an inflationary environment?