Broadly speaking, people can be sorted into two categories. The first type are people who come to church for the "life tips." People who think that the sermons can be useful on the margins, but ultimately their lives are doing just fine. Mary Magdalene is the second type of person, the kind who knows they've got baggage and problems and that life, frankly, is messy. It's always messy, almost by definition.  And that mess was her motivation - she never forgot how Jesus changed her life, and used that as fuel for her faith.