Yes, high-beltline bathtub cars (almost all of them) are for safety reasons.
The impossible-to-see corners and impossible-to-see-out-of rear windows are for aerodynamics. Everything on the road is going to be Prius-shaped. Rear view cams will be standard.
It is not possible for me, so far, to drive my Mustang with confidence. I have to know what is around me or i become unsure which is not enjoyable. I cannot drive a bathtub with authority. Sucks to be me.
Maybe a booster seat would help to be able to properly drape one’s left arm out the window.