Why is science just a starting point and not an end point?


Measurements are useful to verify specifications and identify any underlying issues that might be a concern. Test tones are used to show how equipment performs below audible levels but how music performs at listening levels is the deciding criteria. In that regard science fails miserably.

Why is it so?
pedroeb
This thread is yet another example of an audiophile mistaking his own ignorance of the science for "a failure of science."

pedroeb


Try reading Floyd Toole's book:


Sound Reproduction: The Acoustics and Psychoacoustics of Loudspeakers and Rooms



It's LITERALLY about what you are referring to and explains many of the ways sound character has been correlated to subjective impressions, and how listener preferences can be largely predicted based on that research.


So your thesis is simply wrong out of the gate.   Read the book, it helps answer your question, if you really want the answers.


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Test tones also shows how equipment performs at listening levels but don't let reality get in your way.
Test tones also shows how equipment performs at listening levels

No they don’t. Some of us do have hearing that is both sensitive and reliable enough that we don’t need to a scope to tell us if we heard something or not. 
Look at Prof's post above then read the book mentioned. Nobody's hearing is reliable enough.