At some level, we've always delegated worrying about the minutiae to someone who builds the tool that is one or two levels below.

I usually don't have to worry about compiler optimisations because compiler experts do that; sometimes they appear in a thread about code and say "compiler guy here — if you write your code like this the compiler can optimise it".

And that person will be provably right (or wrong), in that context. And it'll be the same each time you run the test!

I just… ehh. You make a good point and I worry you are not wrong. It's all so different.

I like my 3D printing analogy much more than I wish I did.