I think gene and characteristics are more important than knowledge and degree. I happen to have two parents who are both in education, one teaches in university and one teaches in middle schools. Because of this I also know many friends whose parents are also teachers.

Without any statistical significance, but nonetheless the sample size is greater than 5. None of us consider their parents to be great, or even good teachers. All kids squandered sometime after they are free from the parents, usually in universities.

This experience impacts me so much, that I have a bias that teachers should not teach their own kids.