Does anyone like being asked a question where their answer really does not influence anything? If someone does not have the option of not doing something, why ask them if they can? Why not just tell them they need to do it. Manipulating them does not demonstrate appreciation nor respect. Why would anyone want to do that?
Where confusion lives, costs are high. Many times the price paid is financial and mental. Relationships can be weakened. Faith in leadership can wane. The benefits of clear and courageous communication are obvious. When leadership asks a question that is really a directive manipulated to look like a question, the culture suffers.
There are times when questions are needed, and others when direction is required. It should be normal to know the difference and use the appropriate one. Build strong relationships. Keep the lines of communication clear.