The job of being a teacher is not ideal for introverts. At the core teaching is about social interaction.

You can't learn charisma through reading textbooks. Textbooks don't teach you to be a authority in the classroom and get the children to pay attention to what you are saying.

They don't teach empathy either. Empathy is a strong predictor for success of psychologists in therapy session and likely also useful for teachers.

"Learning styles" are a popular concept but there no good research that suggests that giving different students different training based on learning style is helpful.

Although, as someone who lives with a teacher - we definitely don't need to reduce the time they spend in the classroom, we need to change the fact that they spend double that time marking and planning and doing pointless paperwork.

I agree. Get rid of the whole business of giving students grades outside of automatically graded tests to allow a teacher to focus on teaching.