They actually do. Food burns really fast in hot oil. Turns really dark in seconds.
If you start with really hot oil and drop the food in already, there's very little you can do to fix it. Removing the pan from the heat won't cool the oil fast enough, so the food will still burn. Taking the food out is only an option for some things. Panko breaded dishes don't take well to doing that. The grease gets absorbed too much while you're waiting for your pan to cool.
No matter how many times they flipped that donut, it was gonna burn anyway. If they take it out before that happens, the inside will be raw. The grease on the half cooked donut will soak in while waiting for the oil to cool if they wanna do a retake, basically resulting in a greasy double fried donut. You double fry french fries and korean fried chicken wings, not donuts lol.