Are you thinking about daylight savings time? I’d agree there, but timezones absolutely make sense, and we’ve always used some version of it. “See you at noon” has a sort of built in timezone, as does sunrise and sunset. We (all human societies) relate hours to the day in a similar, albeit more regular way. If you did away with timezones, you’d replace a minor inconvenience with a monstrous one. Everyone uses what, GMT? Naah