From CEI:

These restrictions, of course, act as a barrier to entry that shields existing vocational training operations from competition. Similar policies are unfortunately common across the country—regulations theoretically meant to protect consumers are proposed and supported by current members of a profession as a way to artificially limit the number people competing with them. The good folks at the Charles Koch Institute have been working on this issue for many years, as have a wide array of scholars at other organizations, including places like the Brookings Institution, the R Street Institute, the American Civil Liberties Union, and both the Obama and Trump administrations.