Why does someone who never uses a straight razor ever in their hair stylist career need to learn all about straight razor shaving? Why does a barber that doesn't apply or even possess any hair dye agents need to learn about hair dyes? The license could easily be split into categories, split into multiple licenses or otherwise be examined, but instead it is all packed into one license that is much harder to get without having money pouring out of your ass already to pay for 'schooling'.
I have a beauty school in my town, it doesn't make better stylists, it just pumps them all out of their money and then throws them to the wind with their piece of paper. They just followed some directions on a piece of paper and didn't majorly fuck up, they don't actually have to understand what or why they do certain things and definitely don't need to be skilled. "directions: Shave some hair and clean the razor properly" "Oh wow I managed to do it a single time, now im qualified for it! (yea right) Now I just gotta do 1000 hours of unrelated highlights and buzz cuts, and regardless of quality or fuckups, I still get my license!" Yeah some people do study and become good stylists, the majority of them however are just passed through because they are paid to do so.