A kid comes out of college or law school or grad school the military, ... and for the first time ever, is confronted with a task or client issue or ethical issue regarding something the employee has never encountered or even contemplated.
Their upbringing isn't going to teach them how to introduce a piece of evidence/testimony in their first trial.
Young lawyer: How do I get it in?
Seasoned lawyer: Two different ways. BTW, who's your judge? ......