I value my connection with the local writing community. When I started on my writing journey, it was the knowledge and experience of other writers that helped me to see where I can improve and how to do it. I wouldn't be the writer I am today without the other writers I've met over the years. It's my support network, and when the self-doubt monster attacks, that support network is vital.
Under ideal circumstances, writers should associate with other writers who write similar genres and enjoy reading similar stories, but that's not always possible. Sometimes, personality plays a role, as do ambitions and dreams. In those cases, there are other options available, if you are willing to reach outside your comfort zone.