Because in a two-sided interview the interviewer is trying to evaluate you, but you're trying to evaluate the company and its processes, not the interviewer as

Because in a two-sided interview the interviewer is trying to evaluate you, but you're trying to evaluate the company and its processes, not the interviewer as an individual. Usually it literally does not matter how the interviewer thinks and what they believe is right, you want to know the actual company policy, which often will not be the same as the interviewer might want to. However, if you're being interviewed by your future direct manager, then you do want to get a perspective on how they think, as their individual attitude towards various aspects of work life will be relevant to you - but usually most interviewers aren't that relevant.