I think the point of that procedure is more to illustrate when someone hasn't thought about the logistics _at all_. The problems aren't when you can't answer one random question, but when you can't answer any, even the basic ones like what kind of espresso machine you want to buy.

Even there I'd say that "Yeah, I'll have to do some research on that" is fine as an answer at least at a very early stage. It's when the honest answer is "I don't care, and I don't want to care" that you have a strong indicator that you shouldn't go beyond daydreaming when it comes to this goal.