I disagree. Let me give an example. I remember my networking course in university. The professor had a sort of teaching method by asking questions and then giving logical conclusions. I never could logically explain engineering decisions in networking protocols like my classmates. He would ask a question about some feature or design situation and ask a random person. They always got it. It was not in the book or any where readily available.
He could ask crazy design questions, that to me seemed more like a parallel thought puzzle, and my class mates got it. Always. Professor learned to not ask me after a while because I never could do it. I'm like a dog, everyone else was like a human. They have insight that I don't and I never could get it; a potency in their mind that I lacked. I never got it like they did. I flunked my way through that class at dead last but passing, just like I had done for all the years I spent in school since I was a child.
Maybe I could recite things by memory about network protocol design but I could never really understand it like everyone else in that class did.
I don't think you know what it means to be a failure with no real recourse. I mean NO recourse short of a radical alteration to my biology. Have some compassion for people for whom things simply don't work out. Everyone seems to think that if you aren't the best it's 100% your fault and in a way it's true. Sometimes people just get bested and it's just the cards that were dealt to them.