Writing something is a spontaneous act; the same as the blowing of air & moving the leaves about. It’s not essential to be a big writer to write something that can help others.
People with creative & search-minded approach keep on writing until it becomes as natural as drinking water. You are not in the category of a great writer until you feel anxious on the day you don’t write something.
Food particles gain access to each part of the body through cells. When talking about the writer’s brain, it remains hungry until a new piece of writing gets to that.