I think this question can be applied to all professions. I think it’s all about why the individual is in the profession. There are different motivating factors for why people go into a profession. Someone might do what he or she does because they have a true passion for what they do or they want a steady paycheck, a quick commute, because a family member does the job, because the hours are convenient.....
I have worked in finance and saw people who don't understand how to calculate anything and don't ever care to know or understand what it is that they do and how it fits in with the world. I have also mused over why I don't like the majority of doctors. I have concluded that too many people enter their professions for either the wrong reason or their approach to what they do is not in agreement to my standards.
Someone might become a doctor because it's a respected profession with a steady paycheck but after med school they don't care to learn anything new. They just do the tests that the insurance companies would pay for and push that latest drugs the pharmaceutical companies are pushing. They don't keep up with new studies, research alternative treatments, join associations, etc.... These are the same doctors that tell you that "your symptoms are in your head" or that they have "never heard such a thing" and write you off. If this doctor had a passion for HEALING then he would do what it took to find out what was wrong with his patient for both the cause and the symptoms. He would do some research and speak to colleagues but certainly not write off the patient.
As for the stylist question, even if you were to exclude those who don't have a passion for hair, you still have to wonder “ Was this person trained properly?†This person may be passionate about hair but HAIR may not be their true calling. "What is it about hair that they are passionate about?" "What is their approach and philosophy about hair?" Is it the latest styles, the style for the big event, which requires an artistic touch, and for members of this board, Healthy Hair? Once you eliminate all those factors, you will find that there are only a small percentage of stylists that you approve of.