The lack of empathy comment wasn't for asking where his wife worked; it was for being apparently so utterly unable to conceive of any reasons why when she received the mind-blowing 🙄response that the wife had dared take a decision that might not have been a conventional norm - so much so she knew not what to say, 😱 and even had to start a thread on here to be able to think why someone might take another path. Given the answer was "preparing for a baby", I should have thought even a mild awareness of the fertility struggles some face might have furnished a few ideas. To not be able to think of it, or not care if the thought did cross her mind, is a bit lacking in an ability to understand what someone else might be going through.
Or, Heaven forfend, the colleague and his wife might have made different life choices for their marriage. It's a bit tedious to police that.
I am not sure the question itself was too odd in fairness, though I think people are picking up on a feeling that the op might be rather overly-interested in his wife. I mean there's not JUST the question being asked, but the surprising inability to process the answer and the need to start a thread on it. It has a whiff of mentionitis - and I did giggle at @SpidersAreShitheads 's use of the word "crowbarring!"
I totally agree with @PenelopeSkye.
There are so many reasons this lady may not work and some are reasons to be empathetic and not judgmental, and the balance are largely a case of MYOB.
ETA it seems to be either a case of morbid curiosity about this particular wife, a total inability to see things from a different perspective, or just a plain old goady thread about women who exercise a decision not to work because that works for their family circumstances.