KUINA’S DESTINY Theory

Just a quick thought that just passed through my head, but now I believe that Kuina is indeed Tashighi, and because you scream “nonsense!” let me explain what I think really happened and why.
I always had the doubt that perhaps Tashigi is Kuina, but I just couldn’t find anything to support my claim, until now.
Well you see, I noticed something very interesting about the way she apparently died:
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Note several things:
A. A towel is covering her head
B. She is never seen buried
C. Koshiro doesn’t seem very sad
D. The only was we know she is dead is through Koshiro’s sentence right here.
This is a very detail-less type of death, I don’t think something would be like that especially when afterwards a character near identical both in personality and appearence appears later:
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So here’s what I think happened:
Kuina, after making the promise with Zoro goes back home, now filled with hope for her future, someone finally believes she could indeed be the World’s Strongest Swordsman and tells that to her father, who immediately tells her she speaks nonsense, she was very hurt and upset by her father’s reaction- not only he discourages her but after that he tells her that perhaps being a Swordsman at all isn’t good for her as she begins developing false dreams and now forbids her from being a Swordsman any longer, she becomes very upset and runs away, however in her running she falls down the stairs and is knocked unconscious.
Now she is in a coma, the doctor says she will live and even likely to awaken, however it is unlikely that she’ll be remembering anything.
Koshiro now knew, that would mean she would forget Zoro and her’s promise and knew that would hurt him really badly, and he also knew that would mean she’ll no longer posses any knowledge about Swordfighting, so he decided to do the following thing:
He told Zoro she was dead, put a towel on her head while showing him her “dead” body, because if you see the face you can clearly see she is just unconscious and not dead.
Later, in order to prevent her from chasing “dreams she cannot accomplish”, he decided, in his eyes, to grant her a better life and asked another family to take care of her, they renamed her Tashigi.
When she woke up Tashigi couldn’t remember anything, not even Zoro and their promise, however, despite that, her soul, her entity could still remember the promise and she continued to keep her promise without even being aware of it- that either her or Zoro will be the WSS- so she became a Swordsman and joined the Kaigun and the rest we already know.
Now, on top of Kuina’s very detail-less death, Tashigi is identical to her, and also her age- don’t you think it is kind of a coincidence that there would be 2 people that are completely identical to each other in that manner? I don’t think so, and I also think that Oda even gave us a clue- both Tashigi and Kuina are names of flight-less birds, metaphors to her being a Woman keeps her down.
So, what do you guys think?