Writing is 9/10ths a personal discussion with self and 1/10th allowing others to listen in. Why we write varies person to person. Mostly to let go I think. To make space for new ideas, and new feelings coming our way.
Writing about writing makes money and brings views which triggers the algorithm to do more of the same - on and on. It's rather pointless in the end. After a few years everything has been said, then they start saying it backwards in the hopes it'll be different.
Cheers.