Elon Musk does not know what AIs are? Are you serious?
He has no substantial CS or technical background. He dropped out of his physics masters.
Give him an evaluation.
Also, he has a startup on AI: https://en.m.wikipedia.org/wiki/OpenAI even if you think he's not proficient in technical aspects of AI, he definitely has a lot of ideas about social implications of AI.
He left in 1992 to study business and physics at the University of Pennsylvania, and graduated with an undergraduate degree in economics and stayed for a second bachelor's degree in physics. After leaving Penn, Elon Musk headed to Stanford University in California to pursue a PhD in energy physics.