"The lesson here is that everyone is a creator. The question is “of what.” Everyone has a sphere where they feel comfortable exerting agency — maybe it’s their work, maybe it’s raising their children, maybe it’s collecting stamps. Outside of that sphere, most people are creators only within carefully limited circumstances; most people cannot draw, but anyone can color inside lines, or trace. If the games require serious commitment and challenging creation tasks equivalent to drawing from scratch, they will have smaller audiences."
Player creativity and user created content are some of my favourite subjects, and this post gives a pretty good picture of what is going on there.