Dunning-Kruger is a trend in data. It tells you nothing about what you should do, and you're way off base by suggesting that it does. It's a measurement, not a morality.
'Should' here does not mean 'ought', it means "can be expected to".
As an example, if you are planning a heist and say "The alarm should be disabled for fifteen minutes." you do not mean that the platonic ideal alarm should as in ought step aside and let you steal the loot, you mean that your expectation is the alarm will be disabled. There is no moral judgment.
