Even if the stats showed a drop in cases, it wouldn't make sense. One would have to consider that there are other factors at play.
If some dude added a Big Mac Meal every day to his diet and lost 20 pounds, one would not just assume, oh Big Macs = fat loss. We would assume something else is going on like the Mac replaced other foods to a degree to which he went into calorie deficit, or maybe he is "Tren"ing hard, eating "Clen", "Test"ing his limits, "debol"ishing his obsticles "anavar" giving up. Or maybe tapeworms. Whatever you wouldn't just accept the Big Macs cause weight loss argument.