1. Parents are compelled by their State – not by the Federal Government -- to provide some kind of education for their kids.School people make an effort to deal with the different expectations people have of them. These expectations often conflict with one another. This conflict is a major source of school controversies. It motivates most of the school reform efforts that break out every fifteen years or so in the United States.
2. So, parents worry because they have kids in those schools.
3. Different people, who may or not be the parents of public school kids, have different expectations about what schools should be doing and what they should cost.
To examine these issues further, see School Image: Expectations & Controversies