Extremely cheap, fast food that’s greasy as fuck, has barely any nutritional value, and so convenient that you can just eat it out of the bag - sounds like an American dream.
I’ve found American food is generally less liquidy grease than british food. Americans don’t want fried chicken dripping in grease, they want it dried then covered in various sauces. Also places like golden corral and cracker barrel already exist and are kinda dying