Many times, when professionals are happily employed, they think that they do not need to talk to search firms and, in fact, they may feel some guilt when the recruiters call. So, out of loyalty for their employer, they cut the conversation short and do not write the recruiter's name down. Then those professionals kick themselves for not having kept the names of those recruiters that had called them. It is smart to maintain your relationships with them throughout your career. This is called networking, the successful key to any career.
Vision is the art of seeing things invisible.