I'd love to see the rushes but it's just not allowed because directors and also a lot of actors feel that if they see their work, and the director likes what they're doing, the actor might try to correct their mistakes. ↗
People make mistakes - they say things they shouldn't have or didn't necessarily mean. But I strongly believe in consequences. If there are none, someone might feel like they've gotten away with something, or that what they said couldn't have been that bad. ↗