Congress is too old and clueless to ask smart questions. Zuck's acting all Lore from Star Trek. FB stock is up just because people keep thinking they'll beat this shit, which they won't.
Just wait till earnings. They are going to beat, and anyone not onboard is going to feel the full power of FOMO.
As to their "cluelessness", most of the questions I saw weren't that bad. But, then, I don't expect them to be domain experts in everything.