Why at night and not during the day?
https://invidious.baczek.me/watch?v=rBdmspnCZyc
We see too far, that's the point. How is it possible you see a lighthouse at 50 miles from a ship? If you are 30m above sea level while scoping, the light has to be over 290m high for you to be able to see it. Curvature math is bonkers.