Hmm. My first response was deleted. let's see if this one sticks.
RE Theory has a similarity in the way smaller objects like asteroids tend to be irregular, and the larger an object gets the more likely it is to form spherically, until you reach very large scales like galaxies, which tend to be flat;
2 problems with this theory. 1, galaxies are not solid objects, but collections of billions of individual stars. There has never been a solid, celestial sized object observed to be anything other than (roughly) a sphere. 2, some galaxies are relatively flat because the billions of starts are rotating around the common center of mass. I have not ready anything in FE theory suggesting the earth is spinning fast enough to flatten out into a disc.