I'd claim that this happens not only about information related to people: support for modification is very often an afterthought and a large fraction of all infosec problems I've discovered were caused by people assuming that these things that can change will surely not change in _this_ time window.
@robryk once i believed Haskell programmers were fools for using a language which takes the position time does not exist. but now i wonder if Haskell programmers were in the right all along for realizing the passage off time is not native to computers, in fact is antithetical to it, and must be modeled as a troublesome external thing which we emulate