I don't want just anyone with some tools competing with them. This is a machine full of gas that is awful for the environment. And yes, I'm well aware that in developing countries, a lot of installers just vent coolant into the atmosphere during install rather than doing it properly.

Sure, so have them take a week-long course and register with the county and get a license. 160 hours of class and 2 years of apprenticeship means you have to find someone to apprentice _to_, so the incumbents get to gatekeep how many competitors they're willing to have, and limit it to only the people they like.