This post was also discussing lunch where, presumably, eating while driving is less of a big deal. (Though, yes, some Americans eat in the car a fair bit which makes sandwiches and the like more suitable.)
When I think pizza, I tend to think of it as its own thing given the whole delivery culture.
If you hit a bump eating a sandwich, you mash a soft loaf of bread into your face.
Do the same thing eating a kabob, and you're sending a skewer through the roof of your mouth.
Uhm... you can eat kabobs from the side.
https://www.npr.org/2016/02/11/466178523/like-millennials-mo...