I dont like this crummy idea that you can do no wrong as long as stock price increases.
There should be harm to shareholders. If the US investigates and found that export control laws have been violated and fines Nvidia $X billion then that's harm.
I mean, shares a down a lot, at least some is attributable to his behavior, so there was very direct harm.
Short-term share prices are not a good metric for anything. Shares were down significantly even before this news, and that was because of concern that datacenters will be banned by newly elected politicians.