Exactly. I'm not a licensed electrician. I'm an industrial controls designer who happens to design and build things for the Lighting and Entertainment industry. In fact, there really is no "license" for the work I do.
That said, I daresay I would put my panel and conduit work up against any licensed individual. I design and build my panels to meet/exceed UL508A even if we can't sticker them due to byzantine UL listing requirements, and my installs meet or exceed NEC requirements.
Licensing SHOULD prove that a person has the skills and knowledge to perform a task that, if improperly done, could constitute a hazard to others. In reality, holding a license does not teach or enforce pride in workmanship and attention to detail - that responsibility falls to the individual, and how they were trained.
Limiting sale of electrical materials to only licensed professionals is unnecessarily restrictive, and would probably do little to curb hack work. Hacks are gonna hack, regardless...
SceneryDriver