I think the posters are making some subjective judgements that vary from the norm.
There was a Boston College study awhile back that tracked a group of valedictorians. The were almost all successful and satisfied with life, but were more likely to be in professions. (Doctor, nurse, accountant, etc)
In this forum, entrepreneurs are on a pedestal. It's a different personality type -- when people with entrepreneurial instincts are in an environment that doesn't support them, they tend to do poorly.
My sister was a valedictorian. She's smart and creative, has a great career in a great company, is in a good marriage and has a happy family. Success by any measure that I can think of. There are people on HN who know who she is, but she is unlikely to be a billionaire tech mogul, which seems to be the standard of success in this particular story's comments!