> Alphabet said in a statement that it had offered its head of global affairs for the hearing and that “enabling Larry to focus on the other bets and long-term technical problems is exactly what Alphabet was set up for.” So basically they had offered someone of authority here, but the politicians wanted to have their show trial with the celebrities instead.
In the domain of information warfare and propaganda campaigns public awareness and attention is a large part of the counter strategy. So even if it were just to attract eyeballs to the issue that doesn't mean it was a "show trial". If you watch these Intelligence Committee hearings I think you'll find them to be focused on strategy, partnerships, and actions rather than some form of "trial".
Either way, if they actually wanted the CEO of Google, that happens to be Sundar Pichai, not Larry Page (he's the CEO of the holding company).