An impartial, trained professional...in what exactly? Therapists / psychologists are glorified life coaches. "Psychology" is a mess. All therapists can do is act as a programming rubber duck equivalent.

What makes the psychologist more qualified to give advice to you than yourself?

Maybe the misconception comes from this "training" idea - people think there is some magical solution in psychology and it's not all a pseudo-science. P.S. if you are a trained psychologists, try to summarize psychology to me. Tell me what's left after you take away the failed theories of Freud, aversion therapy, Jung, etc?