The works of people like Norman McLaren (Pas de Deux, Ballet Adagio, Narcissus) and Wim Wenders (Pina) have shown that ballet can be useful subject matter for beautiful cinema.  Unfortunately, for some strange reason, this pleasurable quality somehow cannot find its way into documentaries.  The most recent example of this failure to showcase ballet in the genre is A Ballerina’s Tale, Nelson George’s portrait of noted ballerina Misty Copeland – the first African-American woman to be…