I think it would be better to think of it as, “Do we want everyone to have the same general idea of what 5pm means? Or to have everyone be on one time?”
Edit: I know it’s an imperfect question as northern/southern latitudes can get dark sooner/later than the other pending the season. But 5pm to a Californian is going to feel very different than to a German if we’re all on one time.
Those are just my thoughts, though.