Allow me a different perspective.

I would buy this as a dress watch, and dressing up is something I do very infrequently. I would put on my suit, take the time to accurately set the time and moonphase, and basically stare at it every chance I got during the dinner/party/event/whatever, marveling at the dial and moon.

And then it would go back in the box until the next dressy occasion.

The simplicity (and more specifically the bold statement made by omitting more useful features such as even minute ticks around the dial) is the draw. It’s impractical and boastful about it.

Also I cracked up with your “What time is it? Moon.” comment. I will now forever see this watch and immediately repeat that line in my head.