Everytime there is a paradigm shift there is always that voice: If you don't understand the paint at a chemical compound level you can't make a beautiful painting. Wait what?
Eh, let's revise that analogy. More like not understanding the bricks means you can't make a good building. You can by good intuition, but it won't be spot-on perfect (as by calculating all the physics) and you'll need more luck the higher you get.
Well, most states won't let me practice as an engineer, even if I get really good at Solidworks from watching YouTube videos, because I have no background in the field.