Don’t good generals know how everyone else in their army does their jobs? At the very least to the extent they can see through the bullshit.
For example, I don’t handwrite the code that the compiler produces, but I know how to troubleshoot the IR/assembly and fix optimization issues that arise occasionally. That makes me better at my job of directing the compiler.
> Don’t good generals know how everyone else in their army does their jobs?
They most certainly do, but on a mid-higher level. They don't probably know every single motion and definitely lack hands-on experience. But they know enough to be able to manage them efficiently.