In the 1936 film musical Showboat, how does the song "Can't Help Lovin' Dat Man" help tell the struggles Julie goes through?

Julie sings
"Can't Help Lovin' Dat Man" as an attempt to explain why she continues to love
Steve.

In spite of his tendency to leave home without giving any reason and
to return after indefinite periods of time, often late at night, she still adores him. It
doesn't matter to Julie if he can't hold a job because he's "lazy" or
"slow." His lack of...