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

Technically every way we judge audio or video is based on measurements it's just the manner of our own organic instrumentation vs. mechanical (and we are able to even visualize and contemplate the mechanical instrumentation due to our organic senses).

You mean there can never be any consensus?

Getting things to a minimum "technical spec" level that everyone agrees on is one thing.

What the ears actually  like is another. Science/technical data will be of no help otherwise. Subjective, subjective and subjective.

Be more concerned about your room and speaker placement. Stay off forums.

@pedroeb-
 
                                           "You mean there can never be any consensus?"

      I've been hanging around this site, for 11 years now, as well as watching the debates, between those of the most esteemed theorists of various scientific fields of endeavor, for several decades, regardless of the facts that have been established, through experimentation and testing, over those decades.

                                                   SADLY, I can confidently assert: NO!
       
        Someone, somewhere, as I recall, with much more insight than me: said, "If any man be ignorant, let him remain ignorant."       I'm guessing that means; unfortunately, it's their choice and you can't do anything about it.

seems to me that a person can simply use all available tools (personal experience, scientific measurements, moving speakers around/"room treatment", interminable forum debates, insane guys they know) when determining what playback equipment they want to use