Two answers in one
My daughters, would you trust her to took after you after a major operation, if she had done a "quickie" nurseing course instead of a 3 year degree with plenty of hands on experience in all areas of a hospital?
My answer, there is no way I would let someone cut my hair who had not done the whole NVQ course and had salon experience and you'd better believe I do ask to see the certificate when I go to a new hairdresser.
We are Profesionals here, thats not meant to be offensive its just that my understanding on hair dressing is that cutting is a complete course, and then you go on to do colouring, perming etc. Same as us nail geeks.