But HK, (some of) the things he is talking about seem more out of the park than just coming 2nd place against much older peers. It is more like, I haven't invented any robots, so I must be terrible at science. Because obviously if I was any good, I would be building rockets and landing on the moon type of thing. Maybe that is just a factor of his age and lack experience at what is possible.
But the question is: Do I try to convince him by showing/explaining to him that his age peers are doing x while he is doing y? Do I try to give him the perspective of comparing himself to others? (Normally, given an "average" kid, I would never think of doing that! But is that what is healthy in this case?)