Some jobs can be done by anyone qualified - others (surgeons, musicians, rock climbers come to mind) require a manic level of commitment
I'd put military flying in the second box - you might eventually get depressed doing it but I suspect there is no way you start sceptically and become enthused
Don't waste your time - you clearly are thinking straight and I can't see anyone criticisng you for recognising the issue and doing something about it - life is about choices