It’s a matter of always being aware of the state of your phone. (physically) ie don’t sit down on the floor with shorts on and leave it in your pocket. I’ve been caseless for the last 4-5 years or so. No breaks. It can be done.
Other than a scratch on my screen (fell in between the sections of our couch) freak accident. My iPhone X is holding up great. The coating on the screen is gone (whatever it has out of the box that makes it stay shiny) but that’s a given w age.