Cognitive overhead is the extra work your brain requires to do something it might not have needed to do in the first place. Basically why make something harder to do that is required
The Best Developers are the Laziest Developers
This has been a common saying among technologists since there were technologists.
If you are lazy you find better — more efficient ways — of doing things. Often you just duct tape together something to save you time. Later you find ways to polish and release it to others.