I failed to become a good electronics engineer because I didn't understand electricity and I could never accept the higher concepts without filling in that gap.

It took me until around 5 years ago to realise nobody understands electricity.

Oh sure, we can harness it, produce it, manipulate it and generally put it to an ever increasing variety of incredible uses both at the macro and micro scale.

But electricity, like light is a quantum effect and in the famous words of Richard Feynman, if you think you understand quantum mechanics, you don't understand quantum mechanics.

Why?

Everything else has a frame work. Everything else is an analogy of something else. Driving a train is like driving a car without a steering wheel, a spreadsheet is like a set of accounts, the blockchain is like a list of bank transactions.

But can you describe sight to a person that has been blind since birth?

There is no framework to describe what is happening at the quantum level. If you are comfortable not fundamentally understanding what quantum mechanics is, yet still being able to produce useful theories and practical applications, then great.

As for me, I never could.