I completely agree with you as taken verbatim. However, what they are really talking about is that "why will it fail" is a "conversation ender", and "how might

I completely agree with you as taken verbatim. However, what they are really talking about is that "why will it fail" is a "conversation ender", and "how might it work" is a "conversation continuer". Those are probably bad terms, but hopefully you get my drift. One promotes conversations to end, and one encourages conversations to continue. I would personally promote that viewpoint instead to keep people from doing exactly what you are talking about.