For me, writing serves many functions. I sometimes write about my fears or things I won’t talk about with most people, but I often write to escape reality (much like how reading functions for me). Obviously, the reason a person writes varies depending on the individual.
I find that most of my conversations are surface. Most people I encourage on a daily basis are just skimming that surface. I must feel a deeper connection with a person to discuss my fears, my ambitions, my loss, my love, my passion, etc. This is often with other writers, but not necessarily.