Is a hamburger a sandwich? Or is it a hamburger? A hotdog is a hotdog. Hotdogs on 2 slices of bread, thats a hotdog sandwich. Hotdog in a bun is not a sandwich.
Just because it used to be called something doesnt make it correct. We could go through a pile of things that used to be called something that are incorrect to call it that now. Not going to get into specifics with that one but you get what I mean. But also what if the hamburger isnt shaped into a patty? Just cooked and put on a bun. Its called a loose meat sandwich. Same ingredients. Different name. Served on a hamburger bun. Specificity is important. Taking the same ingredients and changing the way they are presented changes them completely. A tostada or chimichanga are just deep fried versions of a taco or a burrito. But you call them what they are. You dont call a tostada a taco, because then youd have a taco. You dont ask for a hotdog and get sliced hotdogs on 2 pieces of bread. You get a get a delightful hotdog in a bun. Generalizing and classifying it as a sandwich doesnt do it justice because it is its own entity. And I hope you dont take this rant too seriously because we are arguing semantics for fun and I enjoy this debate lol