Follower of the Way
Sure. Many, many rules in D&D have nothing whatsoever to do with realism or fictional worlds or storytelling. Gygax is hard to pin down for a variety of reasons, but if there's any label that he was close to, it was definitely Gamist.If you're not playing the game that way, then this rule seems awkward and weird because it doesn't seem to match anything out of the fantasy source material. But if you are playing the game that way it makes perfect sense - even the rule of not letting you cast spells while wearing armor makes sense in that perspective.