'Vasari claimed that the aging Michelangelo burned most of his drawings so that his oeuvre would be "nothing less than perfect."'
Another sign of the fact that Michelangelo was an obsessional neurotic - unable to tolerate anything other than 'perfection'. Evidently an 'imperfect' drawing by Michelangelo would have been a great masterpiece compared to almost anyone else. It is like Mravinsky who cancelled a public performance on the grounds that the rehearsal had been so perfect it would be impossible for the concert to equal it