All I'm saying if there was no CBO be it AMA or otherwise you would most likely be flying under the limits set down by the FAA. Everyone equal. No one to petition on anyone's behalf.
Be it the AMA or any organization that petitioned for greater latitude and were granted exceptions for its members then by the same token you would be required to be a member to benifit.
I have belonged to many different organizations in my lifetime and every one required membership to participate.
Dennis