My point is: there is no conversation going on. Just people talking.
The other interesting thing specifically about televised Congressional hearings is that Congresspeople have very little time -- AOC had 5 minutes, if I recollect correctly. This gives the person being grilled an advantage -- by simply taking his time with his answers he can run down the clock and be done with AOC's questions.
And if they really wanted to do something, they would pass legislation. But of course, you can't do that and get paid by lobbyists and/or get favors from businesses at the same time. This grilling format solves all interests. Politicians get to look like they're doing something, many gullible voters think the politicians are doing something, and the businesses being looked into get to look like there is something being done about them.