To be useful models must accurately represent some aspect of reality, Reptiles don’t seem to represent the brain of our common assessor particularly well. So this model is as wildly wrong as describing volcanism as the bowel movement of animals. Yes, they pass significant material through a small opening, not it’s not a useful model.

As I have mentioned before these structures are very different, compare the giant spheres used by snakes, bird, frog etc to process visual information and try and map that to a rodent, bat, or human. Hint you’re not going to be able to locate an obvious sphere because the fundamental morphology is just different.