I think DS was a bit dismissive. He could have said "oh, did she have any good tips for getting into the restaurant field?". His reply was a bit curt.
To me, it depends. How often does DH do this? If this was the first time he brought up personal chef-ing as a possible career, the response was curt. But if he brings this up all. the. time., I think DS has more leeway to be exasperated.
I've got a friend who spent years trying to get me to work where she worked (even though, ironically, she hated it). She thought it was vastly better than any job I had, and would not stop bringing it up in response to any anecdote about my work.
"So I had this crazy caller at the office the other day..."
"Don't you want something better than that? You should come work at MyWork. I think there's an opening."
"Thanks, but I actually like my job--I just thought this was funny. (continue anecdote)"
"Today on my way to work..."
"Ew, are you still working there
? Don't you want something better? There's a position open at MyWork. You should apply."
"Thanks, but I'm pretty happy with where I am at the moment."
I finally learned I just couldn't bring up work around her, and there were a couple of other topics that became off limits too, because she always "knew" what was best for me and would not let it drop.