Like the endless stream of “school reform”-ers, you’re seeing and addressing only symptoms. Your motivation is admirable, but you’re mistaken when you think the system can be salvaged by getting good people in the classrooms.
Don’t take this the wrong way, but that’s like saying, “Communism could be a good system if we could just get enough good people in charge.”
The compulsory school system was not designed to benefit children, but to make them into good little human resources - among other goals. It’s corrupt from the foundation. An infusion of good people would not fix it, but merely legitimize it.
Public schools are here to stay, and "the perfect is the enemy of the good". Staying outside the system is the worst of all possible options. Unless you are arguing that public schools can realistically be eliminated within the next few years, I stand by my position that we need to reduce the harm that they inflict on our children and our neighbors' children. Even if public schools staffed by conservatives would not be as positive as universal home schooling, they would be a whole lot better than the status quo.
Public school systems work well in a mostly homogenous society where there is general agreement about what should be taught to children, as there was for most of US history. Now they are viewed as the place to indoctrinate children into the views of any group that has enough influence to gain entry into the schools.
This is just one more aspect of the multicultural, diverse society that the elites have decided is best for America.