That’s silly. That’s like saying science has not found objective ways to measure someone’s health just because an EKG only measures your heart rate.I do not agree that science has found objective ways to measure creativity, imagination, and intelligence. The data gathered is objective but what is being measured may have little or no relevance to the stated goals of the research. Lie detectors, IQ tests, puzzle boxes only measure what the design of the test measures--GSR, speed with which a puzzle is solved, answers to test questions,etc.
I also, for similar reasons, dispute your analogy between engineering and music--we are talking apples vs. oranges here--there is no similarity between good engineering and musical composition. A bridge is either well-engineered and will not fall into the gorge or it will. A musical composition will be interpreted, evaluated, liked, disliked in many different ways by many individuals.
The context I was using should have been obvious to anyone who isn’t deliberately being obtuse that I am not making a literal comparison--as if I’m saying that music builds an actual bridge to drive on. As was obvious, the analogy refers to principles of design and craftmanship that are common to both fields, such as efficient use of resources being a better hallmark of design—in engineering, if one design can do the same exact thing as another but by simpler, more efficient means, then it is a sign of higher craftmanship, etc. Similar things are said in music.