Well it matters for more than one reason. He cheated on his wife with a literal spy, that is going to hurt Nvidia especially now that Democrats are going to take power and they may actually hold people accountable for breaking export restrictions.

Then there's the fact that his a wife may divorce him and there is no prenup. Most of his wealth is Nvidia stock and she will take half of that. Overnight she's gonna become a major stakeholder in the company. How she will act with that power nobody knows and investors don't like unknowns.