Dunning-Kruger and Other Memes
The author only thinks his understanding of Dunning-Kruger is better than average.  No, seriously.  As others have pointed out, the meme is not that actual ability and self-assessment are negatively correlated.  It's just that ignorant people don't know how ignorant they are - i.e. that those at the low end of the scale overestimate their position relative to the maximum.  That version is very well supported by the graphs the OP cites.  He has scratched the iceberg of skepticism and now thinks he's enough of an expert to tell the rest of us that we're Doing It Wrong.