It is very strong image to imagine the Imaam crying because he thought he was not saved. It is a lesson for us all to take, that someone so pious felt that he isn’t saved, then what chance do we stand? Like youself, I listen to music. I also watch tv and movies. If those are all haraam, then I’m pretty doomed as well.
I guess the lesson with the Imaam is we all have to strive to make changes to get us closer to God, and keep on the right path. And we all have things we can fix about ourselves.