Maybe I missed something but I don’t see where they claim to offer anything, so I don’t see why they should try adhering to this (completely unreasonable) standard.
Besides, the anecdote actually offers something: a perspective from someone who escaped the grinder just in time. I don’t have a cohort study at hand, but I know both first- and second-hand that the situation described is not the norm, but all too common. In such cases, the correct response is what was described: jump ship whilst you can. You don’t need a double blind study to demonstrate this when simple logic is enough.