It all depends on the context but let's assume we have Bob that just loves buying hifi and is perfectly happy with his Zu speakers and £100k tube amplifier, listening to LPs through his Michell GyroDec engraved by the ghost of Charlie Parker ..,
Measurements mean nothing here , he's perfectly happy and enjoying his subjective experience. Hell he even believes in ghosts. Fair play to Bob , I bet he's having a blast.
Should Bob ever want to understand why he likes it so much or try and claim it to be ' better ' than Joe's Topping stack and Revel speakers then Measurements , self examination and Psycho-acoustics will be not only required but a absolute necessity, in order to reach a conclusion of actual value .
Who knows what factors influenced Bob but let's recognise that Joe might be Quasi religious in his ' belief ' in measurements. Believing his setup to be superior based on the belief in a higher power, in this case possibly a SINAD chart or some other ' objective ' value , a Internet personality/Guru even , Possibly living in the Seattle area.
Bob and Joe may not be so different, both possibly taking comfort in the reassurance provided by each of their belief systems and experiences. It may well be that Bob has a more balanced life , is generally more self critical and even dare i say objective in his day to day life , he's just into what he's into, remembering his dads hifi , who knows . While it's perfectly possible Joe is a maladjusted obsessive, ruled by anxiety and fear who has little to no perspective at all let alone objectivity.
And then all the possibilities in-between..
So Measurements, all or nothing .. maybe a daft question but if it keeps the arguments contained, keeping review threads cleaner its a rather good thread to have all the same. We used to have fight club for that ., this here is a better solution.