Right of a public school teacher

Dear PAO,

I am a high school student dreaming of becoming a public school teacher. However, when my mother learned about my dream, she tried to discourage me, saying that being a public school teacher is an exceedingly difficult job because they teach more than eight hours a day, excluding the time for the preparation of their lessons. She also told me she knows some public school teachers who were sometimes transferred from one school to another without their consent. Is my mother correct?