Someone asked whether Springfield still existed in Futurama's future.
I answered that it didn't, since the Simpsons don't belong in the same universe at all (hint: different color skin!).
However, my answer was deleted by a moderator. Why? My answer makes sense (I'm not claiming I am right; merely that it's an acceptable & on-topic answer, with a justification), and in fact, someone else answered the same thing, which wasn't deleted.
Someone else making the same point, which wasn't deleted either.
So, why was my answer deleted?