I've never used a case or screen protector, it's always been weird that people care about the design but then slap it in a case and the protector strips the coating. I've dropped my phone on occasion but never broken one. The 14 Pros are tough, and I am glad despite so many people using cases, Apple hasn't detoured from improving on durability.
I prefer the feel of my iPhone in a case and it disguises it slightly which I like. The cases I use don’t strip the coating though as I buy a decent case to begin with. Unfortunately these phones aren’t durable enough for the amount of drops I make and on the types of surfaces either.