(1) because you know they would boil them (2) Requiring a whole 'nuther contraption and method in one of the most streamlined and simplified galley profiles in the history of food (3) to go on a bun completely different from any other served by McDonald's (4) That takes 3 or 4 times as long to separate as a hamburger bun (5) and then doesn't sit politely in place while you condiment it with a caulking gun (6) and is served traditionally in a tray, rather than a wrapper, thereby completely fucking up drive through, which is 70% of their sales (7) only to provide a product that consumers expect to cost 70-80% of the price of a burger (8) which is still on the dollar menu (9) while Costco loses their shirts selling them for $1.50 I know that was a flippant question? But McDonald's is anything but flippant.