A "controlled environment" does not simulate the real conditions that will be faced in a real event. It never will. The random factor is present, and for example it is not the same to go against the clock knowing, for example, that other hackers are trying to obtain the same information as you, while the network administrators or the police are after you.

In a controlled environment you do not learn to develop your skills, and even worse, it does not prepare you to face reality, which is very different from what they propose in the movies.