White people imagine what it's like to be oppressed. Others are oppressed.
White people imagine what life would be like as an underdog. Others are an underdog.
White people image what it's like to have your rights limited, you future uncertain, and you fate in the balance. Others already live that way.
White people have to imagine this. Others have first hand experience.
White people write fantasy. Others write about their real experiences.
I guess that makes fantasy the bored, mindful wanderings of the privileged class.