That's not a conclusion, it's a claim by a human in a discussion. It is certainly not the case that you need a double-blind study before you can have any opinion on a subject (and, I'd argue, a complete misunderstanding of the scientific method).

It's certainly a more defensible claim than the completely irrelevant ad hominem you made about Keybase being "docile in the face of evil". Why was the commenter's employer relevant to the discussion?