It's certainly no disgrace if electricians don't understand the modern theory, because it's just not relevant to what they do. The fact that circuit diagrams represent current as flowing in the opposite direction to that in which electrons actually drift makes no difference to making the motors run and the lights go on.
As for gravity, what this result shows is that Einstein's nearly 100-year-old theory of gravity still works perfectly well. Some people thought that certain discrepancies in astrophysical measurements were showing us that Einstein's theory was wrong, but it turns out that the matter isn't what (or where!) we thought it was. The theory was making the correct predictions all along.
That must be car wiring, we work with AC, and it goes both directions. Most electricians, these days, do get training in DC controls, but don't spend a lot of time with theory, or DC circuitry.
I am a bit different as electricians go, because I started in electronics, and moved to electricity.
I once repaired televisions and the like. i still like to dabble with board level stuff and amplifier design.
Most master electricians don't venture into that field, because there is no need to. There is little money in it anymore.
My questions on gravity are not related to what it is or how to measure it. It is related to how it manifests it's self.
What sort of energy is the field attraction comprised of, and how can we manipulate it and by doing so, create it artificially.
I know the theory, and I don't pretend to understand them as it is not my field, but I have never met anyone who claims to know everything about gravity. If that were the case, why are we still using rocket propulsion and making a bird that has to fall out of orbit and endure reentry heat to land like a jumbo jet.
This is what my questions are.
So are you saying we know this!