I agree with what I think your underlying point is – that we need to consider all leaders holistically – but I think “dangerous” is a strong word to refer to the importance of personal relationships in talent management. Qualifications, experience, and all of the other things we can “quantify” are important, but managing human capital – developing leaders, selecting leaders for assignments, etc. (talent management), depends a lot on intangibles and non-quantifiable aspects too.

I believe this is an “and” statement; both matter. One is not necessarily more important than the other in all cases.