Strictly speaking you are correct. I concede that from an individual licensee perspective. The scenario I had in my head is under permissive, if the community forks, they would be on par with the original author. Under AGPL+CLA, if the community forks, the original author can sell "usable" licenses but the fork community will be stuck to developing an AGPL-only solution, which is a practical hinderance for the new community gaining any ground at all.