I think there is “obviously important” and “meta important”. Two of the quadrants are “obviously important” work. A third quadrant is labeled unimportant, but

I think there is “obviously important” and “meta important”. Two of the quadrants are “obviously important” work. A third quadrant is labeled unimportant, but clearly is “meta important”, even though it contains many tasks which are not important individually. But still meta important to do some of this work. And I agree the fourth quadrant, doing some non-urgent unimportant things in life, is very meta important. Unstructured activity contributes to creativity and recharging in the other three quadrants for me at least.