c,
The interview stance is for interviews, not going h2h. It's a very clear phrase of body language that says "Don't come any closer." Anyone who deliberately ignores that message is clearly telegraphing that they are a knowing and deliberate threat, psychotic, or something else that you do not want getting closer to you.
How long does it take to go from interview stance to presentation? How long does it take you to draw once you have a clear threat in sight and have already obtained a grip on your handgun? That's how long the interview stance puts one at a disadvantage. How close can you allow someone to get before being in the interview stance becomes a potential disadvantage and you need to be moving? 10 feet? 15 feet? 20 feet? Approach within your limit marker tells you that you need to be moving, readying pepper spray if you have it (I carry it support side) including a command voice warning to stop and not come closer, and scanning for other threats as well as making sure your escape avenues are still clear. That's assuming the person has not displayed a weapon and still has both hands in full view. If a hand or hands are not visible, the warning verbiage includes "SHOW ME YOUR HANDS!"
Once again, anyone who refuses to halt when faced with a person assuming the interview stance and issuing clear commanding verbal instructions not to come any closer is someone you need to be moving away from. Standing there like the Statue of Liberty is never a good thing when faced with a potential violent encounter.
The interview stance is just one possible counter to the criminal interview, granted a forceful and provocative one, but one more way of getting inside a potential criminal's OODA loop. It is authoritarian body language in the strictest sense. IF a given person has the physical presence and self control necessary to make it work, it can be a very effective counter to a criminal approach and 'bump.'
To the average street thug, a potential victim assuming the interview stance says "Cop with a gun." John Q. Victim doesn't usually react that way- but cops often do. Thugs usually don't want to mess with what might be a cop, which means end of interview, which means failing the victim selection process.
That's better than winning a fight- or a gunfight...
lpl