Midway through the brilliant and deeply unsettling "Parasite," a destitute man voices empathy for a family that has shown him none. "They re rich but still nice," he says, aglow with good will. His wife has her doubts. "They re nice because they re rich," she counters..With no Riviera red carpets to trip over, our film writers discuss what the festival means to movies, PRINT EDITIONBreathing Easy This Parasite Doesn t Need Any Oxygen|, Page D Feb. . Sunday Review .Like the family in the Oscar winning film, many in Seoul s so called dirt spoon class dwell in basements far below the rich. "Those living up .