Businesses can't make money teaching electrolysis because there is no profit in meeting regulatory requirements and holding classes for the few people who will show up, at the prices they are willing to pay for learning the profession. On the other hand, even if the best people taught the best techniques to anyone who came to learn for free, or for donations, there would be no legal certification credentials at the end of the training, just competency in performing the work, because this second model has bypassed expensive legal hurdles and regulatory controls.
Let's put it this way, both an ASE Certified Mechanic and a so-called "shade tree mechanic" change the oil in a car the same way, they turn one bolt, let the oil drain into a container, replace the bolt, replace the filter and pour in fresh oil. Your car can't tell the difference. If, however, you can only get oil changes from "Certified Mechanics" or if that program has been ended and only Mechanical Engineers are allowed to change oil in your area, you may need to drive 200 to 500 miles away to find the nearest person advertising that they are doing oil changes.