that's news to me. i personally consider that meticulous categorization of fiction to be tedious and childish. Consider that there are no good definitions of "high" vs "low" fantasy, and that there a few books that are both a) successful (whether you measure this in terms of profitability, popularity, or a combination of both) and b) regimented enough to hold themselves to a dictionary-style definition of what the author is supposed to be writing about.
you're using a definition of fantasy that is frankly not supported by the reality of how we consume and produce said literary works.