I don’t really know what you’re referring to at this point.
I’m saying:
A regular flat pizza is not a pie. It does not have a casing, and the “filling” is a topping, as you say.
A (Chicago-style) deep-dish pizza is a pie (more-so than a pizza in my opinion but whatever) because it has a bottom crust with filling on top (a pie according to Wikipedia). That’s not lunacy. It’s right there on Wikipedia, with even a link to Chicago-style deep-dish pizza.
A calzone is a pie because it has crust both on top and on the bottom (surrounding the filling), as well as filling inside.
This is not “lunacy”. It’s just reading a definition and interpreting things to fit the definition. 🤷♂️ If you think that’s lunacy I’d hate to tell you about Pluto. A pie with crust on the bottom is very common. Meat pies, and pastry pies, among many others. Crust on bottom is common, crust on top is common. Crust all around is common… Not lunacy.
I’m going to refrain from talking about hotdogs, because I’ve yet to look up the definition of a sandwich, but I’d rather not at this point lol.