This point might be a bit lost in the current state of the industry as HN is exposed to it, but usually the idea behind keeping a very junior developer around i

This point might be a bit lost in the current state of the industry as HN is exposed to it, but usually the idea behind keeping a very junior developer around is that gradually it'll stop being a very junior developer and become a slightly less junior developer who will spit out code snippets that aren't usually just plain wrong.