A hairdresser does much more than cut hair. If a hairdresser is not in tune with her customers, it will be difficult, if not impossible, for her to fully perform the duties of her job. There is quite a bit that goes into being an effective hairdresser, and one does not want to come up short.
If you go into the job thinking all you need is a pair of scissors and a blow dryer, you will be in for quite a surprise. In reality, that is such a small part of what you need to do. People expect a lot of things from their hairdresser, and you do not want to disappoint them.