@moonwatcher -
"My undergraduate degree in the dark ages of the early 1980s was in aerospace engineering... '
My class pictures were carved on a cave wall, in France.
Even so, the Physics Labs and QED lectures (back in the 60's) and watching the developments in both those fields, in the decades since, more than convinced me: there's WAY too much going on, with regards to electromagnetism, musical signals and our sound systems, than we now know how to measure.
"But the question remains to ask an electrical engineer, or a physicist would be why changing the lattice structure of steel or copper to be different or more organized does anything beneficial for electricity flowing through it containing information that is modulated..."
"Yet, I’d like to understand what is it that you could measure objectively between two similar cables..."
Unless they've majorly updated the EE textbooks, since my days of higher learning: those taking such courses are still being instructed on how folks thought electricity worked in the 1800s.
Of course: when you're only interested in (basically) making things work, those old theories, laws and measurement practices are fine.
It was interesting, comparing what was taught and lectured upon, between the Physics and EE Depts, regarding electricity, at Case.
Made for quite a few interesting discussions between course participants.
Our discussions weren't quite as animated as those at the 1927 Solvay Conference, I suppose, BUT: there was still a contingent (like here, on AudiogoN), that wanted the universe (and electricity) to always make sense. Of course, it's been widely/scientifically proven: it seldom does.