Sounds like a pretty dumb woman. Just my impression...
Anyway, this behaviour is normal. People tend to underestimate other people's problems and pains, as long as they don't feel them themselves. And, of course, they tend to think that your problems are easy to solve because, you know, they are so small and insignificant.
"Just use mind over matter, you loser! Stop ruining our comfort with your whining! You are not the center of the Universe!"
(this is based on actual things I have heard said to myself or other people)
This is not an inability to be empathic - it is unwillingness to be empathic. As long as one feels okay, he doesn't feel obliged to care about other people's pains.
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"Are you alive? The simple answer might be, you are alive because you can ask that question."