I am familiar with this term (and I just codified it!) I have been saying all through – write for oneself. This is called as “Selfish writing”.
Writing is the ultimate test of whether your thoughts make sense or are merely gut feelings. Feelings about why something is the way it is don’t need to be questioned or analyzed in your head because they feel good and you don’t want to rock the boat. Putting thoughts onto paper forces them into an unforgiving reality where you have to look at the words as the same symbols another reader will see them as, unaided by the silent crutch of gut feelings. It’s hard to overstate how important this is in an industry where distinguishing what’s true from what you want to be true determines a big part of success.
Many of the good writers you enjoy probably aren’t much smarter than you. They’ve just forced themselves through the process of transferring vague feelings into words and the clarity that generates. The takeaway for voracious readers is that you can discover new perspectives and new context by writing yourself.
Create more than you consume!