a double cheeseburger by itself isn't the same. the bacon is not about the taste, the bacon is about the texture. it's another layer that makes you feel like you're getting a fuller, better, more Pristine meal. it adds another element to the meat that takes a little of the focus away from the meat so you don't notice as easily how dry the burger is. the bacon is a crucial ingredient to a correct mcdonald's order.
you get a double cheeseburger with no lettuce or onion. it tastes fine. it feels a little small and it's a little dry. you get a bacon double cheeseburger with no lettuce or onion? you have vastly expanded the palette of the dish with such a simple addition, and the difference when trying a normal cheeseburger again is immediately obvious. you cannot go back. this is the way forward.