Good grief--that was a singularly jerky thing to say to you!
I suspect most people say stupid things like that because they just don't know what else to say. They expect the usual run-of-the-mill answer ("good. How about you") and when they don't hear it they open their mouths and stuff like what that person said to you comes out.

The thing that really honks me off is that it's not that difficult to show a little caring: "I'm so sorry to hear that" is not that tough of a phrase to think up and use.
Sigh.

In any case, Shattered Sanity, I'm sorry to hear you're feeling crappy right now and I hope things get better for you soon. Ignore the douche-canoe who said such an insensitive thing to you and keep in mind your friends here at psych central