On a quick skim, my interpretation is that the article critiques the classic (but simplistic) advice that asking questions and letting the other person talk more than you is the key to having a good conversation, especially to ensuring that the other person is happy with the conversation.

The classic advice is basically a caution against being a boring monologuer. And it has its merit. But this is an extra "level 2 conversationalist" lesson. It's the old: "OK remember those rules you learned in level 1? Here's when you can break them".

Th affordance analogy is that you want to give yourself and your conversation partner an abundance of options and opportunities for good conversation. Asking questions often is a way of doing that, but it's not the only way, and not all questions are equally helpful.