A parent of mine was also a teacher, and other than grading their student's 9th grade math exams when I was in elementary school, I was on my own for most of my learning.

So I agree that yes, just having a parent who is a teacher doesn't necessarily get you much, outside of likely being in a home environment where school is deemed important (many don't have this unfortunately). But where things become slightly magical is when you have a genetically gifted child and a parent that both knows how to guide that genius and has the resources to do so.