I would hardly pity them. To me, you are saying they have peaked at 17. That is a sad way to look at things.
To me, you respect the heck out of them. Not every state champ was the hardest worker in their room (some kids are blessed with natural abilities beyond comparison), but at the end of the day, they are the one who put it all together at the right time. IT is a tremendous accomplishment.
Do you pity the valedictorian at your high school each year? Chances are he or she will never reach the intellectual pinnacle in their fields. They may even land in jail. I don't have the data to back that up either, but I hardly think pity is the word.