This is very true -- there are also echoes of how politicians prepare talking points in response to journalists' questions these days. The person being quizzed isn't actually prepared to answer questions, they come prepared with a set of themes to talk about and will seek to massage their answer to almost any question to one of those prepared themes.

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.