I think it's interesting that various people working in AI have very different views on the potential pitfalls.

This article makes a great point: https://arstechnica.com/information-technology/2017/07/zuckerberg-and-musk-are-both-wrong-about-ai/

So it sounds like neither Musk nor Zuckerberg truly understands AI. That's because even AI researchers disagree on what AI means. Some use AI to mean neural networks and deep learning, while others think AI is some kind of human-equivalent creature. The big bad for the Musk camp is called "artificial superintelligence," but cognitive scientists have no good working definition of intelligence, either.

Musk has also been on about overpopulation recently too, which is a pretty flawed idea. See: https://overpopulationisamyth.com

I also think there is too much emphasis being put on what Elon thinks, if his views on overpopulation are not entirely accurate, what's to say his views on AI will be?