Except that it does.Technical reviews can be most useful, however in over 50 years I have never bought any hifi without listening to it, most often in my own home. The data can tell you things about a component, its power handling, its frequency response, compatibility 'perhaps', however these tests are not at all reliable regarding how things actually sound to the individual. For example at uni, engineering, our design professor literally worshipped Klipsch speakers, I first heard them in a private session organised by him. I have listened to every Klipsch speakers since trying to hear what he describes, unfortunately it's hard to do that when they are so bright they make my eyes water! You see a test bench may measure any electrical parameter, it just doesn't measure what I am hearing, or what you , or anyone else hears.
Keith