The cry that 'fantasy is escapist' compared to the novel is only an echo of the older cry that novels are 'escapist' compared with biography, and to both cries one should make the same answer: that freedom to invent outweighs loyalty to mere happenstance, the accidents of history; and good readers should know how to filter a general applicability from a particular story.
The Road to Middle-earth: Revised and Expanded Edition (ed. Houghton Mifflin Harcourt, 2014) - ISBN: 9780547524412