The issue with this stance is, it’s not a zero sum game. There’s no arriving to a point where there isn’t a cognitive load on the task you’re doing. There will always be some sort of load. Pushing things off so that you reduce your load is how social security databases end up on S3.
Confusion comes from complexity. Not a high cognitive load. You can have a high load and still know how it all works. I would better word this as Cognitive load increases stress as you have more things to wrestle about in your head. Doesn’t add or remove confusion (unless that’s the kind of person you are), it just adds or removes complexity.
An example of a highly complex thing with little to no cognitive load due to conditioning, driving an automobile. A not-complex thing that imparts a huge cognitive load, golf.