I'm not against the course. I'm against how fast an individual who have never freedived before can reach certain depths. There are things that (unfortunately) you learn by trial and error and other things that you learn by repeating over and over until it becomes "natural".
That being said, would I pay a course for my kids? Yes, but I will not let them dive without me until I am sure that they have their heads over their shoulders. And that doesn't happen after a one week training.
My older son (15) can dive 70' and I am scared as hell every time he goes underwater. To the point that I have forbidden him to dive if I'm not watching his dive. He complains but I told him: "Is my way or no way!". Period.