There was a story I heard either here or somewhere else. There’s a Thai restaurant somewhere in the States. Only American patrons ask for their dishes super spicy to the point of being inedible. The kitchen just chuckle and throw a bunch of chiles in for these patrons.
So the Thai kitchen often thinks Americans don’t want heat, so they don’t cook it hot. And that causes a subset to over correct and ask for Thai-hot or however overly hot term they use.