Well, in that case, just let him carry on. He's either realised himself that flying is harder than he thought, and that maybe he won't make it as a commerical pilot, or he's one of those laidback types who drift along and take everything in their stride without worrying, who sometimes end up doing rather well. There's more than one way to skin a cat...or learn to fly an aeroplane. I'd suggest you leave well alone.