The problem is there are a whole lot of completely clueless people in Congress who ask profoundly stupid questions demonstrating they know nothing, and we expect them to govern.
For one such example, the question "how Facebook makes money" provides context so that other people would better understand what follows.
For one immediate example, I do not know what or who Finsta is. The answer to that question, as well as preceding dialogue, would help me to navigate through Facebook's business, and my path would be skewed to favor viewpoint of the interrogator.
This is not discussion of peers, but discussion before a jury.
No one learns anything new at these hearings. And everyone is posturing.