There are 2-3 related aspects to this: One part is to which degree the person's own mental model corresponds to reality. If they are out of sync, it will lead t

There are 2-3 related aspects to this: One part is to which degree the person's own mental model corresponds to reality. If they are out of sync, it will lead to pain, no matter what Dunning-Kruger says - the inability to plan or execute in a realistic way, will lead to collisions with reality. Another maybe more problematic part, is the 'understanding and agreement' the person makes with the people surrounding him, them relying on this communicated intent, and his sense of obligation to those promises. If I make unrealistic plans, and promise them to my surroundings, that is where insane levels of stress can come from, when I feel obliged by my promises to deliver pie in the sky. To me, the greatest 'cure' regarding imposter-syndrome, is to work to grow with regards to communicating which aspects are deliverable, and which aspects are unknown. Remaining in the bubble of "I have to promise all problems have been forseen", leads to early death. The third aspect regards humility, and the level of others. Realizing you have made camp near the peak of mount Stupid, already brings you further along than 50% of the people I have met so far in my 30year career. The humility is a good basis for working on it and improving. I have seen people have excellent decades-long 'careers', with Dunning-Krueger as their co-pilot, and they didn't all switch jobs before 3 years-tenure. Heck, I always leave a seat empty in my own car, for either Dunning or Krueger; I'm not sure many are immune to it.