I'm wondering if it's possible being raised between a couple of hammers convinced himself he was a nail? (so to speak.)
I think that is completely beside the point. He was upset enough to end his life; clearly he was ill. Whatever the style of treatment he needed, he was afraid to seek it out because of the draconian FAA policies/rules.
As for people being unaware - you don't have to dig deep to learn this is a very common occurrence.
If trained professionals observing him every day for 18 years missed it, it's not clear that an FAA-inspired program would do any better. I think this tragedy is an outlier, and the guy was a future Germanwings disaster.
I respectfully disagree. The kid ended his own life, without harming (physically) anyone other than his plane. It seems particularly cruel to me to imbue the guy with future mass-murderer tendencies because he was filled with despair.
As I wrote above, it only takes a cursory review of suicide/depression literature to understand this is not at all unusual, and not at all limited to aviation.
Nobody knows what could have or might have happened, but if the guy took the time to write (I paraphrase) "I was afraid to seek help because I'd lose my dream of being a pilot" I think we owe him at least the respect of believing him. I'm not a lawyer but a suicide note seems pretty close to a deathbed confession, which I believe (?) can be admissible evidence.