Psy op implies an amount of planning and the involvement of the military or the intelligence community. I think it is better attributed to chance that the cryptic pretentious musings of one person snowballed into a cultish internet movement. Because it garnered strength online, the musing person at the heart of it probably changed due to tiny power struggles.
People like to know there is a plan for everything. People always suspect a secret cabal behind everything. People are also dumb and impressionable. It doesn't take a general or CIA buffin to try to target the Venn diagram of those three groups. I think it had the results you describe, it contributed to what we see in the US today: a weakening of the rule of law and a slide into fascism.
Calling QAnon psy op is giving what basically started as a 4chan meme too much credit. If no one took a gun to find a nonexistent basement in a DC pizza restaurant, society at large may have never discovered this snowballed cult, and jumped on it like a cat does catnip, enlarging its reach. The secret "cabal" behind it is maybe a handful of people. Bored and slightly Machiavellian internet users with odd political views and/or the love of endorphin-inducing likes and reach. Never attribute to conspiracy what you can more likely attribute to stupidity. QAnon is stupid. Stupidity with disastrous cobsequences. But not a planned psy op campaign.
I think what you're not picking up on is the whole Ms. Moos vibe on CNN. She is basically satire. She always jumps on the most outrageous stories and narrates them in that annoying pseudo journalistic voice and has done for decades. The stories may be actually true but you should never assume that they are. They are a knock knock joke for people who watch 24h news channels.
I don't know anything about this case more than having watched the CNN video. Mr. Fir-lung and his doctor needn't be actors. He could've really had it in his lung but played up the "haha, maybe I breathed in a seed" line because it got him attention on TV and paid interviews. And he doesn't mention how he was in a landslide being chased by a bear 5 years ago and that's when he accidentally inhaled the debris. The doctor may just have mentioned in a subordinate clause that it looked as if the sprig was growing in the lung but never actually claimed it did. Or he also believes in homeopathy. Or he also got paid for the interview. There are a thousand explanations why we get presented the story like that. But the biggest red flag remains that Jeanne Moos was reporting on it.