I know this is rather baffling, but there are people out there - perfectly balanced and otherwise rational people - that don't especially like flying, and don't want to be pilots. My two sons - now in their twenties - quite like a jolly, so long as it's not too long, but find the idea of flying as a hobby about as interesting as knitting, stamp collecting or train spotting (as challenging and fulfilling as I'm sure they all are).
I know it's hard, but I suggest trying to come to terms with the personal insult and humiliation involved when the fruits of one's loins don't want to fly planes.