This sounds awfully like the self-soothing mantra slop-kiddies everywhere tell themselves.

Plenty of people have a deep understanding of software/hardware, as that's the context here. I personally can take you from usermode, through the kernel (both NT and Linux), down to the hardware interface, explaining the vast majority of systems along the way, and critically, as they relate to performance concerns.

So can plenty of others who actually know+understand things.