Aside from your last answer, which is dumb, all of your answers have in common "because the one thing is different from the other thing". Similarly, UA doesn't affect our bodies, but does affect the stars and planets, because they are different and react differently to different forces. They're not the same, so you can't assume they'll behave the same way.
Gee, but using the same logic, when you see something in nature (read: UNIVERSE) repeat the same pattern over and over and over and over and never changing, wouldn't that mean that it's pretty much law that maybe, just maybe the earth would follow the same pattern?
I mean, really, I have argued this before (with only stupid lame unexplained responses) as to why would the earth be the only exception from the observable universe that it would not be spheroidal, and instead flat?
Also, a simple deduction into an object validity as a spheroidal body would be it's apparent rotation. You can SEE in a time-enhanced video of a local lanet, such as Jupiter, that it rotates, but looks flat. i don't know about you, but i'd say that is a pretty safe bet that it's spheroidal, since when I want to look at the reverse side of a coin, it doesn't magically change it's one side, and neither does a planet or star. I have to FLIP the coin to see it, and the same would have to happen for the planet. It's "disc" would have to flip. And I don't see any flipping happening.