That’s different. I’m talking about avoiding to rush towards certainty, not lack of opinion/preference.
That said, “I don’t know… it’s too late to buy groceries, but we got a frozen lasagna, there are some vegs in the fridge, and I could whip some fried chicken if you want. What do you want?” sounds perfect for me. So the issue here isn’t the “I don’t know”, it’s the lack of input.
[Dunno if you were speaking seriously or joking. If joking, sorry for the serious answer.]