The contention by many teachers (and forum posters) is that just because a child is gifted he does not merit having that giftedness specially catered for, developed and helped to excel.
To me, that child is more likely to make a significant contribution to humanity than someone of below average intelligence. It may come from a financial contribution via taxes or job creation, an addition to the sum of human knowledge, a major life-improving/life-saving discovery or a way of saving the planet. That's not a PC thing to say either but a lot of people in the right places seem to agree. Also, pound for pound catering for gifted children represents better value than provision for average children.
If anyone wants to believe differently, be my guest.
"A child with a high IQ is not more likely to contribute to the wealth or culture of a nation, if they do not know how to apply their intelligence"
Absolutely! If they know how to apply that intelligence they are more likely to make big contributions. That's why we need to take special care of them in schools, to teach them how to harness their intelligence rather than having the maths genius sitting in the corner colouring a clown every time the others are doing maths. These C are more likely to slack, get bored. They need more help if we want to keep them working at the same pace as their peers and happily achieving.
"screwed up thinking...how has it affected..."
It's not my DS, it's me, and I've posted elsewhere about my descent into drugs, crime and homelessness as a result of years and years of boredom in school. Not normal boredom but boredom that would be banned today as inhumane.
"Do you have any idea what nurses actually do?"
They knit woolly jumpers for Santa Claus? Or are you arguing that it's just as easy for a nurse to learn neurosurgery as it is for a neurosurgeon to learn how to nurse/clean the theatre floor?