We all have problems, and we all hide things.
But you have to be blind as a father is you in this case did not see that your son had big problems and needed serious help and restrictions.
If Your son drops out due to depressions it is Your duty to help him. If not there is something wrong with You.
I think Lubnitz Sr just proved to all that he was not a good and passionate father. He could have helped his son get proper treatment and job on the ground. That is what good Dads do!
And , no, I am not privy to any information You dont have.
But my field of interest happens to be Human Performance in Aviation, or the lack of it.
This person should never have been near an aircraft , never mind flying one!
Some knew this but chose to turn the blind eye, that is a crime.
His father must have known or should have.