The United States I guess. If I were to be buying alcohol it’s reasonable for them to ask. But that’s not something I often do anymore and generally there isn’t a reason anyone would ask for my id otherwise. Perhaps if I’m in a different state (I do still travel with a form of ID, but not on my person) it could be important. My limited experience with cops where I live have also indicated it isn’t important.
I don’t drive either which is a much bigger drive as to why I don’t feel the need to constantly have official identification.
Edit: I suppose it is important if anything “went wrong” and I needed my body to be identified, but again, that would be a case where people are wondering where I’m at quite quickly and the cops likely putting something out to identify such a person.
Edit 2: I also did try to get a state ID but they make the process so laughably difficult that getting a passport was easier - further, they don’t accept a passport as a main source of identification. I instead needed to also have a physical copy of my social security card (despite the other mountain of evidence I brought about my existence and propriety living in the state) and I never quite understood that. They do gladly accept the taxes I pay though. No questions asked!