I agree with @KaMaMom . Many of us have these stories. The idea that every teacher, director, etc wants the best for your child is just not true. Mostly because we are all human and as much as we would like to deny them, many times we make judgments and preconceived notions about people based on very little knowledge. Sometimes, in the case of a director, teacher, coach, whatever, these split judgments have long lasting impact on a child. When that happens it can be hard on the entire family.
At any rate, I certainly hope this mom was just venting. I don’t like the idea of every parent defending their child being called a helicopter parent. I try to not label parents because I certainly didn’t find parenting the easiest job I’ve ever had and I genuinely believe most of us did what we thought was right.