I hope you don't mind my speaking to the point of order, although you seem to have made a ruling on it already.
I think there's wisdom in not asking a witness to try to prejudge a particular decision. If you put a hypothetical case to someone in this witness's position, you're inviting her to prejudge it. That's where the point of order has force. We might ask about general beliefs and opinions. But to suggest a hypothetical question and ask a witness what he or she would do in such a case is to invite an official to prejudge. This is what the rule is seeking to avoid.
Thank you.