I think there are a lot of nuances.
Yes, a forum like this shouldn't be used to ask others to find simple objective facts. But I do think it is appropriate to discuss which sources people like to use to find those facts, or to direct someone to a resource where they can find reliable and accessible information. And even the smartest person may not have the frame of reference to comfortably interpret what may seem like simple answers to others, so why not ask a friend?
I also think the existing conversation and dynamics can be relevant. I wouldn't call my mom to ask her a question I can look up, but if we're on the phone I may ask her a question like that just because it came up in conversation or because I just want to chat about it or because I want to acknowledge her as a source of knowledge. In the same vein, I wouldn't create a new thread simply to harvest the fact, but I may ask a simple question in an existing topical thread.
I remember reading our OP's question and thinking it was better suited to looking up on a posted reference source, but thought it wasn't too far out of bounds because there was an ongoing discussion about the meal and we were already helping her. Pointing her to a great source for thawing overall was great, but I would have phrased it more gently.
I'm not going to let facts get in the way of a good memory
but I remember reading a thread enthusiastically discussing NaNoWriMo, and I posted asking what it was, then got directed to look it up. It kind of left me with the 'uncool kid on the playground feeling,' where I wanted to join the conversation but got brushed off. Of course I could let my fingers do the walking, but that wasn't the point.