Maybe I misunderstand, but it's not disputed that the Earth is negatively charged. That means everything has a downward bias towards ground or counterspace by default. Mainstream physics tried to make this overly complicated to understand, obfuscating it with ridiculous equations.

https://image.nostr.build/0fcfd671ef8127aed9b7803ab07ef04f3939f28611f836012f75908b7ed8d59b.jpg

And yes, the concepts have to work so that they are believable. Everything has transforms and would work the same whether or not the Earth is moving. GPS uses coordinate systems based on geocentric models. This is one thing people fails to understand. Engineering, flights, etc. all would work the same way because they are all based off of the assumption of a stationary, non-rotating plane. 

Things fall down, no one disputes that. The mechanisms for why things fall down are up for debate.