I'm completely capable of doing minor work myself. But I like having records of all the work that gets done. At least untill the warrenty is over then i'll work on it myself. Plus im not cheap. spending a few bills on maint. every few months is no big deal. I would rather pay a 'proffesional" to do the work i need knowing that its right.
The peace of mind your "supposed" to get by having a proffesional do the work is well worth the money, at least IMO.
Thats why they get 60$+ and hour for labor. Job should get done right and there should be no questions as to the quality of work they do.