No, it is disqualifyingly clueless. The author defends one neural network, one bag of effectively-opaque floats that get blended together with WASM to produce non-deterministic outputs which are injected into the DOM (translation), then righteously crusades against other bags of floats (LLMs).
From this point of view, uBlock Origin is also effectively un-auditable.
Or your point about them maybe imagining AI as non-local proprietary models might be the only thing that makes this make sense. I think even technical people are being suckered by the marketing that "AI" === ChatGPT/Claude/Gemini style cloud-hosted proprietary models connected to chat UIs.
I'm ok with Translation because it's best solved with AI. I'm not ok with it when Firefox "uses AI to read your open tabs" to do things that don't even need an AI based solution.