You refer to a discussion, and a discussion is a two-way thing. In face-to-face engagement, most of us would walk away pretty quickly if the person we're talking to dictates that we only discuss what they want, how they want - especially if we don't know them well.
No-one owes anyone anything here; we're all volunteers. Someone can ask people to discuss a topic a particular way, but they can answer how they like. Any poster *demanding* that they control the direction of the conversation is likely to come across as entitled, seeking validation rather than feedback, and/or uninterested in genuine engagement.
Also, in my experience, if I don't get the answers I expected to a question, it's almost always because what I thought I was asking is not how it came across to the listener. I get a better response if I reframe my question, not tell the listener they're wrong.