It's not based on real events. 'The Island of Sea Women' is a piece of fiction that explores various themes and emotions through the characters and their fictional experiences.
I'm not sure which specific 'young women and the sea true story' you are referring to. There could be many stories about young women and the sea. It could be about a young woman's adventure at sea, like a solo sailing journey or a story of a young woman working on a fishing boat. Without more context, it's hard to say more.
It's not a true story. 'Bright Young Women' is more likely to be a fictional tale crafted by the author's imagination. It could incorporate common themes and tropes but not be rooted in reality.
The significance could be to inspire. It might show the courage of the young woman in the face of the vast and often unpredictable sea. True stories often carry a sense of authenticity that can encourage readers or viewers to find their own strength in difficult situations.