Ask HN: Why are interviewers not playing the game?

I often hear people saying that a candidate should always ask clarifying questions to the interviewer. On paper it sounds wonderful but I often noticed that at least 50% of the interviewers don't open up. Asking clarifying questions is seen has "well, obviously you're not answer my original question" instead of "sure let's narrow down the scope so you don't waste too much time on unnecessary things".

In other words, it feels like for at least half of the interviewers, asking questions is a sign of not performing so well versus performing well and really playing the game to turn the interview into a nice technical conversation, rather than a question/answer type of thing. Why is that?