Of course he's right. If anything I'm surprised advertisers aren't cutting back more given how much revenue they're probably losing during the pandemic. Real change has to come from two sources. Firstly regulation, Facebook will never "self-regulate" and this corporate activism is a joke. And secondly, from employees who in sufficient numbers have at least some leverage.
You do realize that regulating Facebook and other social media companies in order to force them to limit speech on their platforms would expressly violate the First Amendment? And, thank God for 1A, given the enormous amount of interest people have in limiting speech.
Yet FCC is still around regulating speech on broadcast television.