I think there's a significant difference between :
a) It's December, you're talking to a financial advisor, they're saying 2020 isn't looking, so good so you sell off some stuff, and
b) You're a Senator that has just participated in private briefings in January to receive information that is not available to the public, and then "coincidentally" you subsequently "happen" to have a sell off of stocks right around the exact market peak through your "blind" trust, while you also continue to try to tell the public that "everything is fine".
For some of these people, it was almost certainly something like the latter, where they were warning their financial people based on their inside information, not the other way around.