As a businessperson, I tend to think of other professional writers as “the competition”. As a fiction writer and author, that situation is not the same. Authors of novels and of a great book series are not competition, they are community.
Failing to realize this and holding oneself back from reading the works of others not only limits your enjoyment in life (because there is some truly great fiction out there), but it also holds back your skill and your imagination.
Check out my own experience in returning to reading after a solid year of writing: Becoming a Writer Who Reads.