For example when Zuck says:
>My top priority has always been our social mission of connecting people, building community and bringing the world closer together. Advertisers and developers will never take priority over that as long as I’m running Facebook.
This is either misleading or a lie. Facebook is a corporation, what Zuckerberg wants to do as an individual isn't even relevant, what's relevant is what the corporation "wants" to do to increase profit. So far that has been pursuing connecting people and building communities and then taking that information and selling it to developers and advertisers. The phrasing places community and monetization in competition but Facebook's model isn't of competition between those it's model is a monetization of community. So the testimony never speaks to the fundamental problem of having advertisers as any level of priority here.
Also to say that Cambridge Analytica abused the system sidesteps the issue of whether it was in Facebook's interest to allow this data to be collected and then misused. Cambridge Analytica purchased data which made Facebook the most attractive advertising platform for them because of the targeting they could do. That is good for Facebook's bottom line. They also don't address the total amount of information that may be out there, floating through advertisers outside of Facebook's control right now. Despite new restrictions how much about me is already out there? That's what I want to know.
Overall, it's basically what I expected but I really hope there are a few representatives who can set aside the specifics of this one incident and attack the wider notion of Facebook's purpose.