Sign into an existing account

This sort of reasoning reminds me of some religious people.

"Figure out how a universe exists, or you'd better worship God."

My superficial answer is going to be that gravity explains the behavior of water on Earth. The planet had gravity before the formation of water. Water formed in a gravitational field. Like everything else that formed billions of years after Earth's formation, the fundamental physics were primitive to the "local" physics. The precursors to molecular water and even to complex life were spinning with the Earth before molecular water or life existed. To do what they do on Earth means their behaviors supervene on being accelerated toward the ground constantly. Everything that does anything on the surface of Earth has to evolve with that condition, and it actually explains a lot about the basic features of life, such as why we have musculoskeletal systems that appear designed to resist the acceleration due to gravity.

In other words, most of the interesting things you see on Earth's surface are interesting because they have "figured" out how to grow/climb/move in a direction perpendicular to and away from the ground. That's the rule, not the exception. A round-Earth theory is going to explain a whole hell of a lot more than your theory does. Generally, it's not good practice to identify one thing a good theory can't explain in a way that satisfies you and toss it for a theory that is far less powerful.

Just because I don't have a complete theory of fundamental physics, doesn't mean everything that lacks a satisfying explanation immediately points to the most retarded theory we have.

Do you suffer from Aphantasia?

If this illustration portrays the size of the planet then Sonic, proportionally, is in outer space.