One wrong theory doesn't disprove an entire model if all the other parts of the model still work. If that were the case then flat Earth would be equally false as it also can't explain everything completely.
It's very easy to prove the Earth is a sphere even without gravity. It's even easier to prove that gravity exists which just adds to the ample proof of the Earth being a sphere.
It's not. More like 50% at the highest.
And again, if you think that calling gravity an "unproven theory" helps your claim you're simply ignoring everything that science is.
Not that any of that matters anyway. Flat Earth is patently ridiculous and obviously untrue.
One wrong theory doesn't disprove an entire model if all the other parts of the model still work. If that were the case then flat Earth would be equally false as it also can't explain everything completely.
It's very easy to prove the Earth is a sphere even without gravity. It's even easier to prove that gravity exists which just adds to the ample proof of the Earth being a sphere.