Let's me 100% honest here - if we cannot define clearly the psychological and medical definition of a burn-out (with accurate diagnosis), it is just fine to discuss in non-scientific context. The moment you call this a study and no one here is willing to ask hard questions makes me extremely disappointed in HN and the intellectual curiosity that usually drives discussions here. Why do I feel like there is some political angle to this? (labor rights).
It would take a lot of mental gymnastics to twist this into a political statement. If we "cannot define clearly the psychological and medical definition of a burn-out", why are we even studying it in the first place? That would be like experimenting without a control group.