And if that is the true case, its textbook NPD. What makes us excellent individuals is our capacity to improve the self through healthy interaction with others and for a higher goal than merely than pleasing the current iteration of our self. Such leads to stagnation, and ironically a decay of who we are. Even the most staunch objectivist knows what he does benefits others, and they too benefit from another. Creative writing and art, in particular, are defined by constant divergence of thought, and takes an external look beyond the self and its tight, narrow interests, unless it be a reactive derivation of already established works (which people could argue that his work seems to be that way). Ultimately, like all exploratory endeavors, creativity is nourished by thoughtful observation outside the self and thus demands growth of the self in its process. It's why art is usually used as vehicle by suffering people, a concept in psychology known as post-traumatic growth. Narcissism is the antithesis of creative thinking, it demands conformity to the self as an ideal, and thus censors anything that distances itself from that. It can be seen in the works of edgy adolescents who are trying to find their individual place in the world for example, fan-fictions of empowerment promoting avatars of their narrow interests and cliched echoes of their experiences. Typically, such work boils down to someone creating a form self-apotheosis, which merely proselytizes the readers and viewers to conform to their perceptions and feelings, rather than offering novel conceptual challenge.
If he is truly this way, I deeply pity this man... We all start with our position as the base line in creativity, the self and its ideas are the default. We all have the potential to be like him creatively, stuck with our pet interests, making edgy hedgehogs or escapist mental junk-food. But if we talk at the wall, don't interact, don't heed constructive criticism, or respect out audience; if we do not challenge ourselves with different art styles, writing methods, and explore new ideas with and of others, then we will end up like him.
I think this is an apt allusion.