My speculation is there's pressure for the C suite to push this Russia and China hiring ban for some reason. Looks like the board is telling the CEO this has to happen or they're in negotiation talks to be acquired by a big company like Google who wants this to happen now and the backlash to have passed by the time it's announced. So this will happen whether it's illegal or not (and it looks like it will and is illegal) but the risk will cost less than the reward.
If they go to court they spend at most a few mil fighting it over the course of a few years and the executives walk away super rich anyway. If they don't go to court they walk away even more rich. But if they don't do it they might rely on an IPO that's looking shaky because of this bad decision making for the past 2 months. So even if it's illegal, it still makes sense to do this. It looks like an exit strategy because they will never be personally liable.
She probably sees this and knows everything going on behind the scenes, but she won't walk away super rich from this but could lose her law license by engaging in discrimination.