Like you I voted YES to the poll, and like you I wondered how anybody could vote no. Perhaps they misunderstood the question and thought it was just about ukemi in the sense of 'falling' and not in the broader sense of being a good Uke.
A little related story: My sensei once quoted Nishio Sensei for saying that being a good uke is the most important part of learning Aikido. If one learns to be a good uke then the rest will follow. Made me think a bit.
I'm really looking forward to read any answers to your post.