Social development is at least as important as professional development. There is a reason why Author's parents are sending him to elementary school and college

Social development is at least as important as professional development. There is a reason why Author's parents are sending him to elementary school and college at the same time - the elementary school provides a key social development framework that the college would not provide alone. Furthermore, I think that you conflate cause and effect regarding high school. High school is not inherently toxic, rather, the adolescent process of developing Independence and the lack of emotional maturity combine to make high school years awkward and stressful. But because the underlying cause is there regardless of whether or not a child attends high school, the same effects will result regardless. As long as the child is in a high school in which the child can form friendships, the high school is a net positive, especially if, in the author's (eventual) case, the high school is a high school for gifted children which grants the children time to pursue endeavors which intellectually stimulate them.