Every year my children, who attend a California public school, hear about the contributions of Martin Luther King and Cesar Chavez. What's wrong with also learning about the contributions of, say, Harvey Milk?
If you think that replacing core subjects with these contributions will make your children more competitive in a world market, nothing. Unfortunately, it doesn't. Your children will be competing with highly educated and prepared Asians and Indians. The executives looking for educated and capable employees won't care at all about the contributions of Harvey Millk (which was nothing by the way).
So what you are saying is that we should cut out ALL social studies since they don't help in a "global market"? Guess that goes for the Arts too? What about sports programs? How do they help in a "global market"?
Tell me about the Japanese school curriculum. Do they exclude the arts and social studies? How about in places that are tops in education like Finland? Do they exclude anything that doesn't help them in the "global market"?
The area that I lived in was pretty much ethnically Chinese. A model closely followed by the Japanese. The children go to public school, some go to private school. After school, at 3pm, they go to Chinese school where they receive the education they don't get in public school. After Chinese school, which ends at 6, there is fine arts instruction. I was in art school with plenty of Chinese kids in my class starting at 6 years old. On other nights, the students attended music and/or dance classes. "School" ended at 8 or 9 pm. Then it was time for homework. The entirety of these educational programs is overseen by Chinese Tiger Moms who consider the education of their children their primary occupation whether Mom is a waitress or a surgeon. Sports is an elective, and only if the child shows a propensity. Sports with the changes in sports which minimize winning is not emphasized. Attending public school is a requirement of the law. Those who cannot afford private school, can afford supplemental school. Those that cannot afford supplemental school do it themselves.
When you eliminate the social programs, the sex education programs with grades handed out for how well a child can put a condom on a banana, you would be surpirsed at how much time there is for art, music and sports. After all there was no problem whatsoever in the past about accommodating these subjects.
Like it or not, your children are disadvantaged by the lack of education they are getting. Since you, as a parent, won't demand that the schools do their job of educating, it is incumbent on you to take steps to see to it yourself. If you persist in believing that teaching these asinine social programs has a value in a global marketplace, nothing is going to help you. You may wish they had a value, you may want it, but factually, no one looking for an engineer is going to hire someone because they know about MLK but can't do advanced calculus. Which is something taught in Chinese schools by age 12.
It's really ironic, but private and supplemental schools do not have the same problem with bullying and intimidation that our public schools have. They have NO problem. The students are so challenged, with the expectation of excellence so high, they don't have time to engage in nonsense like a gay/straight alliance to make gays feel good about themselves. They are busy, they have better things to do. The nonsense is confined to Americans and other students who don't pursue quality.