Fair, but the baking part is really more like heating a bunch of already cooked ingredients. So there’s not much of a change with the elements of the ingredients and the heat from the oven just fuses them into an integrated dish that you can pick up with chopsticks. The only thing that drastically changes is the mozarella cheese that melts. Otherwise, the entire dish stays as is and can technically be eaten even without baking.
So the analogy would instead be like assembling a bread bun, cooked beef patty, some veggies, and heating it in the oven for a couple of minutes. It’s already a burger before putting it into the oven, and it’s the same burger, just toastier and maybe crispier, afterwards.