Which part do you not follow?
Breaking the curse was just one part of Emma being the Savior. Emma has been walking down Monomyth Road for a long time (the Heroes Journey) and one of the biggest (maybe THE biggest) parts of that journey is defeating death/the representation of Death and Chaos. That’s how you know they are the hero. If Emma has to come to terms with her Savior role then she likely has to accept that she has to battle Death (Hades) and free the souls to move on.
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"He was a lot of things to me" "The only conclusion was love"