Political arguments are a bummer for people who aren't well informed, like you. What he did is not morally grey, it's morally repugnant. Your moral compass is way off.
An unprecedented storm was coming for the American people, and he was well aware of its severity because of the information he was exposed to as a member of that committee. Instead of warning his constituents of the imminent danger, he publicly downplayed the threat while allowing a select few well-connected donors access to the insider information he possessed. Then, before the economy cratered under the weight of this disease, he sold off stock based on that insider information. What he did borders on treason, and is at the very least disqualifying. I personally hope he spends the rest of his life being well-respected by the federal prison guards who supervise him.
Fuck off with this bullshit.