They weren't starting from scratch 200 years ago either. Tillers were standard in boats for thousands of years, it was a perfectly reasonable way to steer a vehicle.

Likewise, at first a purely textual interface was a perfectly reasonable way to interact with a computer terminal, but the addition of mice changed the game, as did higher resolution displays and widespread adoption of touchscreens. We're 80 years into screens, 60 years into computer mice, and 20 years into touchscreens. Clearly lots of interface changes are just to keep the designers at a company busy, but it's also silly to be confident that we've nailed UX/UI standards.