A lot of people are very skeptical of credit cards, and it’s pretty common to see people recommending against them or outright calling them evil with pretty much the same arguments you see here.
Among those who like credit cards (of which I am one), the “credit” part is basically irrelevant. Paying for my stuff a few weeks later is nice, but it’s not why I use credit cards. If there was a card that offered an extra 0.5% cash back but purchases had to be paid immediately, I’d jump on it.
It's clear that this extra 0.5% is there, because the company hopes to make it up on late payment fees extracted from less financial savvy people, or the high fees.
Among those who like credit cards (of which I am one), the “credit” part is basically irrelevant. Paying for my stuff a few weeks later is nice, but it’s not why I use credit cards. If there was a card that offered an extra 0.5% cash back but purchases had to be paid immediately, I’d jump on it.