The episode in question is available on YouTube and is pretty damning. But there's a portion featuring a clip where a one 737 assembly line worker asked his coworkers if they would fly on those planes. Several said no and one dude who said yes joked he had a death wish. But overall their view was the planes were unsafe due to seeing how bad the quality was themselves.

There's also the recent news that a different Boeing whistleblower got off his flight when he realized he was on a MAX despite purposefully booking a flight avoiding that plane model. Honestly really concerning that the very people who worked on those planes don't want to fly on them.