I get the feeling that Lou doesn't have any real passion for writing. He says he's a writer and made it a part of his personality, but deep down, he has none of the vision, patience, or desire to tell a story that even a terrible amateur writer has. He says it because within the furry community being an artist or a writer would elevate his status. He has no ability to draw and people would see that right away, so why not just claim to be a writer? He wrote one or two horrible pieces and repeats a few tired cliches so in his head that can be a part of his identity. It's like how he "identifies as a woman", he identifies as a writer, despite doing nothing to even try to actually be one. It's just another label he wears, it's for external validation, not for internal fulfillment. Why spend hours and hours writing drafts of a story when you can just slap "writer" in your Twitter bio? He wants others to think of him as some frustrated author held back by his circumstances because if not, then he's just a gross old NEET living at his mother's house.
It's frustrating to see because he quite literally has "a room of his own". No job, no spouse, no household duties. All his time belongs to him. If he were happy living modestly he would appreciate how rare it is for a 40-year-old man to have gotten this far in his life without having to work and having all the time he wants for creative endeavors (especially writing, as it is quite possibly the least expensive hobby there is). But then he wouldn't be Lou. Though I am just dying at the mental image of Lou trying to shove enough rocks into his ratty sweatpant's pockets to sink him as he descends into the Alleghany River to die.