[ender341341]

The problem pilots face as pointed out by OP is that pilots facing minor depression who seek treatment face massive repercussions to their career/income, potentially completely losing their career, so instead of treating minor mental health issues they go un-treated (or self medicated) until they're massive mental health issues.

[iterminate]

Mass murder is not the natural conclusion of minor (or even major) untreated mental health issues.

[nextaccountic]

unfortunately however, untreated depression increases the rates of suicide