It would be for me. After my awful abandonment by my "oh so experienced" therapist who didn't have a supervisor I wouldn't want to see one who didn't no matter how many years they have been practicing. I would even go so far to say that being in practice for a long time causes a "blindness" or a burn out or an inability to look at things in a new way. I think for that reason therapists need someone to run things by who can help them be objective.