It certainly isn't something for Ronald fucking McDonald to have an opinion about.
"Having sex with a direct report" is not on that list of prohibited reasons.
But does that make it reasonable for hackers to think that drinking a glass of water is some kind of horrible offence, like some lunatics seem to think about workplace relationships? Which are one of the most common way that people meet and get married.
Does Nvidia have such a policy? Unless laws have changed, this isn't an issue as far as the law is concerned.
(Googling - seems they may actually have this policy...)
From what I've heard: Nvidia's operations is heavily reliant on Jensen. He's embedded in everything. Early in the pandemic, I interviewed with them. The recruiter said that pretty much every engineer at the company will, at some point, be in a meeting that includes Jensen. I spoke to a friend who worked there and he confirmed it.
(Probably no longer true as they've grown a lot since then).