There is far more value system than engineering in your post. The objectives of science-minded audio enthusiasts don't have to coincide with the list you presented. If I want to obtain the flattest possible response from a given cartridge, I will deploy science and engineering to adjust the frequency response and to measure how well the adjustment worked. Furthermore, that science and engineering is actually more accessible to people who mess with software enough at work not to want to do it so much at home, but that's a whole other topic. "Messing with software" has also attracted a religious following every bit as dogmatic as they claim others to be, particularly about the necessity for continuous innovation (I did not say meaningful improvement).
One of my hobbies (see Newman's definition above) is restoring a 49-year-old GMC motor home. It is, in many dimensions, objectively better as a motor home than current offerings, but in other dimensions would be laughable in the current market and against current technologies. Yet it is a ripe topic for deep science and engineering, and very much of both get applied by those similarly engaged.
Do not burden science and engineering with the religious worship of newness.
Rick "people enjoyed and were moved by music playback 50 years ago--who knew?" Denney