You are, of course, not answering my specific question. Yet again:
Regardless of "official" criteria for vaccine success, are you suggesting that a vaccine that greatly diminishes the risk of serious illness and death, with very little risk, even if it does not prevent transmission, is not something a reasonable person would want to take?
We all know why you are not answering this question - you are not answering because you know that you would have to answer that, yes, it would be wise to take a vaccine that reduces illness and death even if it failed some standard about preventing transmission.