The Dunning-Kruger effect doesn't actually cause people who are good at a thing to say they suck at it and people who are awful to say they are good. In the paper, most tests found that estimated ability was positively correlated with ability, but had a lower slope.
You must be an expert in the Dunning-Kruger effect, so I defer to your superior knowledge.
I got my misinformation that "highly skilled individuals tend to rate their ability lower than is accurate" and "skilled individuals tend to underestimate their relative competence, erroneously assuming that tasks which are easy for them are also easy for others", from the wikipedia article https://en.wikipedia.org/wiki/Dunning%E2%80%93Kruger_effect . Maybe you should correct that erroneous article with your competent, highly skilled insights.
When used to describe a cognitive bias that causes highly skilled people to underestimate/under report their competence level, it is absolutely valid to refer to that as the Dunning-Kruger effect - which is exactly what DonHopkins did. Not only was he correct in using that term conversationally, the format of your reply is also unnecessarily abrasive.
