I think the fact that a group controls its membership qualifications is not really a problem as long as other groups can compete with them to address the same needs. And without special treatment from the government. A level playing field, not subsidies for one model at the expense of other models.

Realtors control their numbers and qualifications too. But you can still be a real estate agent without being a Realtor. Having and protecting a brand is ok. Getting government to put some group in charge of all people addressing a need will raise prices.