Is this explainable in any way by the cost of running these boards? By the sound of it the cost-benefit of thwarting Salt Typhoon is probably not optimal at zero investment.
Replacing government run and funded cyber security and threat assessment roles with privately owned contracters will be quite profitable for a few of the Brolliegarks.
No. The cost of running these is so small as not to be worth top officials' time in worrying about them. If they are looking to save lots of money, there are far more efficient ways to do that. This is just clearing house, establishing a tone, and making it clear that expert opinion is not valued.