But I suppose the message, hard to read as it is, is something that some people need to hear. I've seen this first hand a few times, mostly in people who got promoted by working really hard and the more they got promoted the harder they felt like they must work to keep proving themselves. This often led into burnout.

I don't know; I don't really want to blame the people themselves or say that they're the ones responsible of their own condition. People, and I want to say technically minded people in particular, are each rather fallible when it comes to our own humanity and the psychology underneath. And so, I'd much rather see this same advise be targeted to managers and senior teammates: when you notice a colleague who seems to have gone in too deep, have a friendly chat. They might very well be blind to it, or trying to ignore it to push through just that one more time.