Endurance, eh? Not entirely sure what you mean there.
Endurance was exactly the word I was looking for, Flight Training requires exactly this: "The fact or power of enduring an unpleasant or difficult process or situation without giving way". - and yes, I have done my PPL training.
I sense a bitter sweet attitude from you, maybe this is the reason why.
Your absolutely right, commitment and determination is key, but it's not the only attribute you must have to succeed.
This forum is exactly what you make of it. Be quick to judge others on their choices and you'll receive exactly the same treatment.
Regardless, I wish you the best of luck in whatever you chose to do.