That's a very narrow view that's a function of one's religion, culture, and values.
When I was in school, (US) my very Catholic French teacher explained that his uncle, in France, had a mistress. His uncle's wife knew and was okay with it. What my teacher was explaining is that the culture around marriage varies considerably through the world, and you can't take for granted that what we were taught (monogamy) is the standard that others live to, or even expect from you.
Perhaps it’s you that is out of touch?
Please don't make the mistake of assuming that American culture is homogeneous: It's not.
No, there isn't.
There is a significant part of American culture that separates personal life from professional life. IE, an affair is treated as a private matter to be handled by the married (or committed) couple. (IE, this is why many people in this thread focus on Huang's job performance over the affair.)
And I agree with the latter: The affair is a matter between Huang and his wife; it's a signal of his trustworthiness and honesty, and raises concerns about national security. But beyond that, it's not my place, or your place, to judge.
Well we don't know that, you are not legally required to love someone you are married to and I have no clue what their relationship is like or whether they have any sort of "arrangements". I could hardly care less really since its their private matter.
> just what might he do to you, the customer or shareholder?
I don't really see a correlation between those things. All sorts of immoral degenerates (e.g. Musk, (potentially) Gates and I assume plenty of other lesser known CEOs) have generated massive amounts of value for their shareholders.