Maybe it's almost a plus that the quote is a bit muddled; I interpreted it in a different way: Even if it is a bad song, at least you've written a full bad son

Maybe it's almost a plus that the quote is a bit muddled; I interpreted it in a different way: Even if it is a bad song, at least you've written a full bad song, which means you may have learned something that may make your next creation better. Both interpretations are valid, and both reflect something about innovation in general.