In OPs post it stuck out to me that Elon counsels his brother on shutting down empathy, to be a better CEO, and the brother complaining about how he, and not Elon, got the empathy gene.
Just coming out and saying that your brother doesn't feel empathy with other people is certainly a choice. So is presenting it as an advantage.
Good question!
The guesses and rumours that you have got as replies makes me lean towards "apparently no one knows".
And because it's slop machines (also referred to as "AI", there is always a high probability of some sort of scam.