It's important to remember that these psychological effects are statistical effects, ideally from an unbiased population. The moment you are aware of the effect, you can use its conclusions to guide your own self judgement.
It is possible to be bad an understand you're bad at something. It's possible to be good at something and understand you're good at something.
The purpose of understanding psychological biases is to combat that when judging ourselves, and others.
It's important to remember that these psychological effects are statistical effects, ideally from an unbiased population. The moment you are aware of the effect, you can use its conclusions to guide your own self judgement.
It is possible to be bad an understand you're bad at something. It's possible to be good at something and understand you're good at something.
The purpose of understanding psychological biases is to combat that when judging ourselves, and others.
Nicely put! I agree that you can judge yourself as objectionably as possible to determine how good you are.