What's wrong with K-12 approach?

I am a high school teacher. I love my job, I love the high school kids, I love the fact that my students are an everyday challenge, they are full of surprises, thinkers and doers. I love to trick them into learning something new. I love that they teach me a few things now and then. I can't imagine teaching kindergartners or elementary school kids. I don't want to describe why, I just can't. I know many great teachers who can't teach neither elementary nor middle school level. The job requires completely different set of traits in a person. I always get frustrated when hear all of us, teachers, put in the same pot of K-12 which ignores the specifics of both: the kids level of comprehension and the teachers' skills and talents. In our days you often hear complains about schools. Some even say that the education system is in crisis. Maybe. If we want to fix it, let's first agree that the elementary school teacher has to teach the kids just to read, write and count. They have enough responsibilities teaching everyone how to use a bathroom and how to clean their noses. They have to teach the kids the rules and how to be a student. They have to teach the kids about day and night, about seasons and weather. They have to teach the kids how to read time and find the length using a ruler. Are we sure that we want the elementary school teachers to teach "science" to their students? or any other subject that was not their major? I don't. I prefer to teach not reteach. Many good high school teachers will tell you how hard it is for us to reteach the mistakes made by an elementary school teachers. The subconscious always overpowers the new information we try to put their. Elementary school teachers fill in subconscious before we train the brain to think. I have to think about this. Continue later :)