The FO's pay was maybe triple the comparable US pay.
When left alone in the cockpit, his total hours were slightly more than one third the minimum needed for a US ATP rating.
Treating mental illness is not like setting a broken femur. As has been stated here over and over, the side effects of treatment can be worse than the disease.
Not everybody can be an airline pilot, no matter how much they want to be one.
And it can be dangerous when privacy concerns trump public safety.