Except for the YEARS of McD’s own managers complaining about the excessive temp and requesting to reduce it.
It caused third degree burns. I’ve spilt half a pot of fresh food-service coffee on my arm and had both first and second-degree burns, but not third. You know, because food-service coffee makers all heat to the same temp, except for McD’s, which has their’s set much higher. (Go research why McD’s milkshake machines are always down, despite being the same machines everyone else uses).
Having worked in many restaurants and some fast-food joints, they’re all the same, and don’t seem to have the supposed problem you claim.