Biopics, especially musical biopics, have to face a challenge. How on Earth are they going to interest and engross the audience in the genius of its main character with more than simply reenacting some key events in that person's life? How do they explain and depict the creative or revolutionary force that has come so far as to inspire an entire movie? Well, I don't know, I'm but a lowly internet critic but plenty of people in the movie business have tried their hand at it. Add to that list Bill Pohlad with Love & Mercy, his biopic of Brian Wilson of The Beach Boys.