It’s not just high school. That’s just how chemistry is taught because it’s extremely complex and requires many simplifications to be able to teach it to a lay person in any meaningful capacity. Good instructors will mention these simplifications, but it’s likely your current understanding of certain things (especially organic compounds) is also overly simplified. It’s unfortunately the only way to teach it.
It’s not just high school. That’s just how chemistry is taught because it’s extremely complex and requires many simplifications to be able to teach it to a lay person in any meaningful capacity. Good instructors will mention these simplifications, but it’s likely your current understanding of certain things (especially organic compounds) is also overly simplified. It’s unfortunately the only way to teach it.