I don't see any reason to call him a plant. He's calmly stating what every well-informed scilon knows. Discredit the FZ? How does this discredit the FZ? This is textbook Hubbs.
Clams are not supposed to talk about what they "know" except maybe if you're Tom Cruise, doing a promotional for other clams. Among clams, they are allowed to agree, that they're the only people who can really help others, in a variety of ways, all thanks to the technology of Dr. Hubtard. Hip hip hurray!
Clams are not supposed to talk about their case, things they are dissatisfied with about the organization, its leaders or founder. What Dr. Hubtard wrote is what is true for you -- that means you are supposed to guide people toward Hubbard's books or courses, or the Org, to find out what is true for themselves. It's about the certainty of being certain, and knowing knowledge.
Anything else is squirreling or out ethics. If you have a complaint about something or someone, you may file a Knowledge Report. Dr. Hubtard put security and justice actions in place for every type of situation to protect the flow of energy into his suitcases. Shooting your mouth off about all kinds of alien craziness is reserved strictly for Dr. Hubtard alone. Not even Mr. Miscavige is allowed to talk in public or make videos about alien secrets, the history of man, or the four quadrillion year history of the universe.