With so many comments concerning incompetence bordering on negligence, it is interesting that the authorities have seen fit to allow them to travel/escape back to Korea. There must be a good reason for that, right??
Sure is. It's because the US doesn't put pilots in jail for accidents, unless the accident is the result of violating the law. Even then, it has only happened once, to my knowledge.
Your assumption that this somehow proves something about the competence of the pilots is flawed from the very start.