Yes, and the US government should investigate that and make a determination as to whether export control laws were violated and how serious the violation was. That hasn't happened yet.
> Yes, and the US government should investigate that
Well, there is also a problem in that the US government agencies tasked with investigating such things are currently very compromised.
Todd Blanche, the Attorney General/head of DOJ, constantly says that his job is to protect the Trump administration. And Trump is linked to this whole story in various ways.
So there will be no fair investigation for the foreseeable future, other than potential congressional oversight hearings next year after the Democrats take control of Congress.
Yes they should, but this does not preclude the board and the public from concluding based on the available information that his judgement in this area seemed extremely poor, even if it may not end up illegal. It sure doesn't look like a situation where people are surprised that Alice Huang was a spy ...
The US was investigating it and Nvidia (aka Jensen) name-dropped a Trump appointee to get it to go away. That alone is resignation-worthy in any political era in our lifetimes before Trump.