Wouldn’t the difference be explained as staying for a brief period as an individual vs transporting an entire country to a different plane of existence?
No, because the only reason Rumple transported an entire world (and then waited an extra 28 years once they got here) was because there was no way for him to just easily come alone to the world he needed to get to in order to find Bae. Except apparently there was if the Snow Queen can just stroll through a magical door and be here.
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