This feels so common that I would not even be quick to assume this is some sort of unknown betrayal to his family. One of the revelations about the Gates' lives was that Bill's promiscuity was apparently baked into their marriage agreement. At this level, your marriage might just be like a fixed mailing address for someone who has multiple homes.
Not to excuse this in any way. But these are the personalities of medieval lords and kings.
Are there details on this? Yes, I do like the sordid gossip.
You've lost me here.
There is something in it for the wife. The world is a bit more "House of Cards" than some people assume. Aside from the French and a few others, western cultures seem almost uniquely dishonest about the tacit assumption that successful men will have mistresses. This isn't a new thing. Warren Buffett was essentially married to two women most of his life and no one cared.
Many wives highly value the accrued status of being formally married to a high-status person. You can take half the money but the social status doesn't follow. No one cares about a billionaire divorcee with no status beyond a bank account.
If you accept your partner has those urges, you can either treat it antagonistically and have those urges become a problem in your relationship or you can absorb them into your relationship and have it be strengthened by them.
You either become the one being cheated on and weakened or the one in control with a relationship strong enough to not be threatened by some side action, which in turn makes you a rarer and more valuable mate.
Or as a less cynical take, there's also the phenomenom of compersion, the ability to feel joy from a partner's happiness with other people. If you truly care for somebody and want them to be as happy as possible, you might be willing to set your ego aside to create that experience. And of course, that sort of security is again very attractive and a rare trait in itself.
But (unless "unknown" is doing a lot of work in your sentence) Huang literally said this in his letter to NVidia employees: "I was unfaithful to my wife. My actions hurt her and our children. There is no excuse for what I did. I am deeply sorry."
Otherwise, I agree with a lot of what you said. In the 2000-2015 timeframe, I really idolized a lot of these successful tech leaders - they seemed incredibly smart, hard-working, and talented (though also of course lucky). But over time I came to the realization that many of them just fundamentally think very differently than I do, and I view that other way of thinking with disgust. The main issue is it seems like nearly all of their relationships are transactional, and they have a lack of empathy and willingness to be ruthless that is simply anathema to me.