During the trial it was revealed that McDonald’s knew that heating their coffee to this temperature would be dangerous, but they did it anyways because it would save them money. When you serve coffee that is too hot to drink, it will take much longer for a person to drink their coffee, which means that McDonald’s will not have to give out as many free refills of coffee. This policy by the fast food chain is the reason the jury awarded $2.7 million dollars in punitive damages in the McDonald’s hot coffee case. Punitive damages are meant to punish the defendant for their inappropriate business practice.
It’s more the fact that McD was aware that their coffee strategy was a ticking time bomb due to many complaints from staff and customers, but they didn’t fix it.
IIRC the reason they heated the coffee that much in the first place was that it prolonged the time the coffee tasted fresh, so they didn’t have to make a fresh batch as often. Aka more profit.