It's the other way around.
It takes my breath away how consistent the mean length of a day is and how accurately we can measure it. So accurately that if it deviates by mere tens of milliseconds, and it does, we can notice it.
It boggles my mind that a hunk of rock made up of differing densities, with so much of salty water sloshing around, Moon exerting her brakes, bombardments by extraterrestrial matter, Earth still remains so consistent. Of course, this is not surprising if one does the math.
Yes math and physics are different. It's the the fact that math can model the physics so accurately at all that it's breathtaking.
ha ha ha!, we state the same thing, I think, maybe, but it's the "10's of milliseconds" of inconsistancy that I am refering to, we can measure things in as you well state, a "breathtaking" way, but are then reduced to bieng reality's mad, overworkered, note keepers, and ALL of the clocks are still ALWAYS wrong, with the very definition of time becoming something that we must descibe as "realitys ongoing mistake, that we must correct for". I will indulge myself and go a bit farther into woooooo, teritory, in that this new ability to keep time so accuratly is something that resists entropy by creating order, where there is none.