Why is the feeling of owing your success to others a syndrome? It is the truth. Hard work and brains can get you only so much. You owe a huge chunk of your success (or what you are) to others. Anybody who doesn't accept this as a fact, and is in the illusion of being purely self-made is a narcissist, perhaps getting close to psychopathy.

The article is talking about feeling that your achievements are not significant. To me this is also a very healthy thought. As long as you can recognize it as such. It is a part of recognizing the fact that there is a lot to be done yet.