How is that dumb? There HAS to be something thats sideways on a SPHERE, Period. How is the impossible to see? It might not look like it on ground level, but from a satellite?
You don't see that on a flat earth, cuz guess what? Its flat.
Even buildings 50 miles away from my view, when I'm at a peak of a mountain should be a quarter mile under the horizon because of the Curvature equation. But I see them perfectly. Also only possible on a flat plane.