Yebbut, you're looking at your friend's brother's experience from a kids POV, Griff is an adult with parent-side experience and he says she isn't suited for these courses. I see a difference. I don't doubt they have her best interests at heart. I do doubt they are taking the right approach to find out what really is in her best interest.
And I think that all parents have an idea of what's best for their child, and children do need guidance, but there are right ways and wrong ways of doing it. If you just tell them what they are going to do, will they go into it with the right mindset to give it their best shot? Probably not.
I think you need to be open with them, tell them why you think what you think, explain what difference your looking at it as an adult with experience makes and point to their personal evidence that such-and-such is a good decision for them. But then I'm a tree-hugging-hippy-liberal, what do I know?