(Not so seriously.) I suggest, it may be even worse. Arguably, a person who is able to integrate, to connect and to convey her/his thinking to an audience is more likely to be regarded widely as competent than a person who doesn't. But there's a problem with this, namely complexity of thinking. We may observe that it becomes extremely more difficult to connect in this way, as the distance in understanding and the complexity of reasoning increases from a common mean of understanding, as the load of information and education implied and required to follow an argument separates an expert from a layperson. However, there's a feeling of suitability of what is to be conveyed, to be discussed, what may be worth to be communicated. Generally, we do not like to just repeat the basics of our understanding, this is not the point we're at, the gravitational center of our deliberations. We haven't engaged in higher education, just to repeat the eyeopening one-liners of the introductory lessons over and over again. There's a gradient of complexity, and arguably a worthwhile statement is located somewhere at the higher half of it. And, as things are, the more natural we are, the better, the more successful we are in communications.<p>By this, we may conclude, a person commonly acknowledged for her/his competence is also a person successful in communicating understanding, thus a person, who's understanding is essentially neither more informed nor more complex than the average understanding. A person at the high point of the career, just before adhering to Peter's principle, is also a person, who has been shifting for merits, understood by just few, eventually to a field, where her/his genuine level of competence is just a bit above of the one of the general public, honoring this with general praise. The experts must stand aside, in shame, as they are necessarily excluded from this communion. Even if, by some peculiar accident, our person has maintained a respectable level of expertise, she is ultimately nudged towards a flattering level of communicability. Thus we may propose, a successful career is rather the matter of a diminishing epsilon, which separates expertise from common understanding. Peter's principle is not dysfunctional, but rather the vanishing point (quite in the literal meaning, as far as this epsilon is concerned).