> The fact that he slept with a suspected Chinese spy is not a crime either.

He's not being prosecuted; the legality or not of his actions is meaningless.

> His wife may divorce

Which could be awkward for NVDA if there is no prenup as I've seen reported.

> But marital infidelity seems insufficient as a cause to fire a CEO

If that infidelity opens you up to blackmail, it definitely gets up there as a fireable reason.