They can't?
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versus ...
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Quantification is attaching numerical identities to observations. In that sense, yes, it helps in assessing what something is doing ... or at least,
how much it is doing. It is not intrinsic to answering the question. "Why?". That is for observers to deduce. For example, in the charts above, the resonances are more numerous in the HiFiMan phones, and they are also of greater amplitude. That, along with the deviations ffom target response, mark it as inferior to the Dan Clark set.
But quantification does not tell us
WHY those resonances are so extreme, nor why there are more of them in one set rather than in the other.