It’s popular to knock fast food, but it is easier to measure than food made at home. I love to cook, and I do almost every day. But I have to accept much more of a margin of error on what myfitnesspal says my calories, fibre, and macros are at for the day. I know exactly how many calories a double cheeseburger has, and exactly how many grams of carbs, protein, and fat I’m getting. I can expect it to be exactly the same at any location on the planet. I might eat fast food a dozen times a year, totalling maybe 20,000 calories. In the context of the 700,000+ calories I eat a year, any purported negative effects of it being fast food are insignificant.