Season seven yielded none of the political ambition that makes the city of Washington, D.C. a Dating Swamp but also none of the diversity and culture that redeems the place. The appeal of “Love Is Blind” is that viewers can be voyeurs, watching the dating rituals of different cities unfold while other people test out the theory that true compatibility is of the mind. The seventh season, which airs its reunion episode Wednesday, promised to explore some burning questions about the culture of our