Are you saying that a candidate needs prep in order to prevent getting comfortabe?
No, not at all. I am saying that there is merit in this interview style. If you are selected for an interview, SWA considers you a qualified pilot. If you have 1000 PIC Turbine, have not been violated, have not killed/injured yourself or others, and have good references; then it is obvious you know how to fly airplanes! Now, SWA wants to find the right kind of person for the company. You can be a great stick, awesome pilot (whatever that is), Top Gun, NBAA pilot of the year, blah, blah, blah, but SWA wants to know if you play well with others inside and outside of the airplane. That is the intent of this interview style.
Rather than a sim ride, SWA does a CRM ride in a mockup to see how candidates deal with situations. Personally, I think that is more important than demonstrating how well one can fly an ILS.
Also, do you believe the interviewers to be infalible? Do they truly believe that they can see through their interviewees?
I do not and I'm sure the interviewers do not consider themselves infallible. That is why they get together afterwards, compare notes, and discuss the candidates. I do not know what you mean by "seeing through their interviewees". If you mean attempting to know the real person, well, isn't that the point of all interviews? If you think the "old school" style of pilot interviewing is 100% objective (fly a perfect ILS and get a job) you are fooling yourself! An interview and subsequent job offer is ALWAYS subject to the perceptions of the interviewer regardless of what type of interview is conducted.
If this be the case, then there is no reason for prep. I submit to the jury that the continued success of the various prep services is evidence that the process CAN be gamed. I fnd it hard to believe that anyone would go into a Behavioral interview without intensive prep. The other team is prepped, if you want to win, you'd better out prep the opposition.
I think you are putting way to much merit in the behavioral aspects of the interview. These are pilots not psychologists. They are not out to trick you, fool you, outmaneuver you, or beat you. As Firstthird said, they merely want to know if you would be an ok person to spend four days with locked in a cockpit and if you are a team player.
(please spare me the testimonials from people who claim to have foregone prep, they got it somewhere, ,most likely from learning politics in the military.)
Learning politics in the military is good prep for a SWA interview? I disagree. Regardless of my opinion on that, following that logic, all life experiences would be good prep for the interview, would they not?
To sum it up: Prep can be good or bad depending on how one uses it. Going into an interview knowing what to expect and having put some thought into question/responses has its advantages over going in cold; however, getting prepped and "acting" or trying to be someone else, or giving "canned" answers generally does not work. I'm sure some can "game" it and slip through the cracks, but for most it does not work.