As a professional, who also happened to work as an Executive Search Consultant, I have almost never turned down an interview invitation with a legitimate enterprise. Knowledge is power and even if you love what you are doing it can be beneficial to listen and gather intel. We have no idea what is going on his head or behind closed doors, but taking an interview is not necessarily indicative of a desire to leave. In fact, for the senior finance and management consulting roles I was retained to hire, I typically did not consider candidates that were actively looking to leave their current roles. I wanted candidates that were successful and happy with where they were, but curious enough to listen,