Isn't is another unproven fallacy that gravity comes from the center of the earth? Round earth depends on this foundation.
Absolutely. No one has ever demonstrated that "masses" per se attract one another, much less that they can act on one another over a distance. If you were to place a massive object somewhere and then suspend a marble next to it on a string ... in vaccuм and zero-G environment ... they would absolutely not move toward one another. If there were such a thing as a zero-G or low-G space station, that could have been one of the first things proven conclusively, that masses should move toward one another. But it can't be demonstrated ... because it doesn't exist.
No, things are drawn toward the earth for an entirely different reason. Now the earth itself has a negative charge, while the atmosphere has a positive charge. I've seen experiments done between two plates where the polarity was changed, so that the negative charge was above it and the positive charge below, and the object flew up and clung to the top plate. I forget the name of the mechanism that was used.
So the fact that things move toward the earth is likely some function of electro-magnetism or else the pressure of ether, as Tesla held.