I'm making 2 points:
His metaphor completely fails conceptually, because I'm perfectly capable of imagining genies that fall outside the three categories.
Perhaps the classification works in some other setting, such as AIs. However, the article never provided any arguments for this (or any arguments at all, really). Instead, there was one single example (seriously, just one example!) which was then extrapolated to all genies.
Ok, so, do you actually have any examples that fall outside the 3 categories:
1:Powerful+Safe
2:Powerful+Unsafe
3:Not very powerful such that it doesn't matter so much if they're safe or unsafe.
https://www.reddit.com/r/science/comments/3nyn5i/science_ama_series_stephen_hawking_ama_answers/
the vast majority of the discussion is about AI risk.