This article misses that the asker knows about these limitations as well, and it also misses that the answer in itself alone is devoid of meaning for the interv

This article misses that the asker knows about these limitations as well, and it also misses that the answer in itself alone is devoid of meaning for the interviewer. It’s the context that matters - for example a comparison of skill A which the candidate rates at x out of 10 to skill b where they rate themselves a y out of 10. Both x and y are meaningless, but the relationship between these two is not. Self awareness is also important, both in terms of strengths and development areas. People need to be aware of their blind spots because we expect them to take a step back and let themselves be led where appropriate. And people need to be aware of their strengths because we expect them to step up and take the lead if necessary. A quantitative scale for qualitative things really helps having the right discussions with candidates.