The below is from the article which applies specifically to your point:
> Cut the cameras. Most of what happens in committee hearings isn’t oversight, it’s showmanship. Senators make speeches that get chopped up, shipped to home-state TV stations, and blasted across social media. They aren’t trying to learn from witnesses, uncover details, or improve legislation. They’re competing for sound bites.
> There’s one notable exception: The Senate Select Committee on Intelligence, the majority of whose work is done in secret. Without posturing for cameras, Republicans and Democrats cooperate on some of America’s most complicated and urgent problems. Other committees could follow their example, while keeping transparency by making transcripts and real-time audio available to the public.