Yes, I have politely ended a couple of interviews and the interviewer is always shocked, because I think most people think the interviewer is in the power posit

Yes, I have politely ended a couple of interviews and the interviewer is always shocked, because I think most people think the interviewer is in the power position. They may be a gatekeeper for the job, but you are the gatekeeper for your time. Hiring a person is a mutual decision. Since job descriptions are usually quite vague on some important details about the team and company, applying for the job is simply expressing interest in the job, not a confirmation that you would take it if offered.