By that logic, cupcakes can be multiple things depending on how you eat them.
If the cupcake is whole and frosted on top like how they’re normally served, you have toast. But if you rip off the bottom and turn it upside down and place it on the top, it is a sandwich. If you inject the frosting into the middle with a piping bag like an unemployed donut maker, it becomes a calzone.
What I’m saying is cupcakes are valid options for all meals of the day.