20driver
A question for you. Which of the following crews would be more likely to line up at the wrong intersection. A crew where the Trg Capt has established that despite the FO's inexperience he/she can feel free to question something that worries them or one where the Trainer has made it very clear that HE is in charge and the trainee should "shut up" and only do what they are told.
Of course the first crew could still make the same error but I would suggest it is less likely and that is what most airline professionals strive for.