If you expect everything everywhere to be a grid, sure, your mental model is not reality-compatible.
Thing is, that's also true of most "grid" cities, too - San Francisco offers you two grids, and then ignores both of them in hilly regions. Most cities I can think of in other places also are inconsistent.
There's a great story of some Parisian aristocrats that attempted to flee Paris, but became hopelessly lost! Turns out a map of the city hadn't yet been created.
Thing is, that's also true of most "grid" cities, too - San Francisco offers you two grids, and then ignores both of them in hilly regions. Most cities I can think of in other places also are inconsistent.