The person in your organisation most likely to burn out, least likely to ask for help, and hardest to reach with any standard provision is often your strongest performer. Not despite the competence — because of what sits under it. For a significant number of high-functioning people, the drive is load-bearing in a way that has little to do with the work: achievement is how they know they are enough, how they stay ahead of a quieter doubt about their own worth. They are visibly capable, often the most capable in the room. The capability is real. It simply never counts toward the verdict they hold about themselves.
This is the population a detection model never sees. They do not present as struggling. They over-deliver, they never take sick days, they are the safe pair of hands — and the whole arrangement runs on it: the good evidence drains away by morning and the bar resets rather than clearing.