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I find it really sad how overlooked is the rarity of Harry and Ginny's couple dynamic.
In stories like Harry Potter where the main character is clearly the main character and not just the person who gives us their point of view for the story, it's very common that the love interest isn't an equal to the hero. Usually, the love interest is one of the helpers of the main character which inevitably creates an unbalanced dynamic where a lot of the life experiences of the love interest revolve around the main character. Take Ron and Hermione, they are not equals to Harry. They are equals to each other, they are the only two people who know what it means to be Harry's best friend in the war but the stories/adventures they are involved in aren't theirs. They are not equals to Harry, which doesn't mean they are less or more, just something else.
Ginny on the other end is the only character between the young ones - besides Harry obviously - that is a main character in her own right. She has her own story, her own friends, her own adventures, her own giant trauma, and her own relationship with darkness. She has her own hero story with her leading the rebellion at Hogwarts and her own helpers, Neville and Luna.
She is a main character whose story we don't have the opportunity to read. And Harry is her love interest just as much as she is Harry's one. She may understand Harry perfectly and so be perfect for him, but Harry understands her perfectly too and therefore is the only logical love interest for her.
And even after the books she keeps being Harry's equal becoming famous in her own right with professional Quidditch and then assuming the most influential role in Wizarding World sport as editor of the sports section for the Prophet.
She even has her sort of prophecy with the whole being the first daughter in seven generations and the seventh sibling, something that supposedly makes her quite powerful, something that we see, something that even Slughorn, a man who knows pretty much all the people who are worth being known, recognizes.
To solidify this point, her story is circular like Harry's. If Harry starts this story as someone who needs to be rescued and who is in search of a family he ends it with him protecting other people for a job and having a loving family. Ginny starts her story as a young girl who as such has to hide her true ambitions, as someone who because she wrote in a diary faced unspeakable horrors, and she ends the story with being famous for her talent, the mother of a youngest sibling and girl that she'll make sure will grow up not needing to hide her ambitions and a journalist, reclaiming her passion for writing.
Harry and Ginny are basically two main characters with a lot of secondary characters in common who happened to find each other and get married. It's basically a cross-over between two stories it's just that we've read only one of the two.