Thats like saying Zeff is a rehash of Shanks because he sacrificed a body part to save a child or that Law's flashback is a rehash of Robin because he lost his island because of the world goverment. Thats really dumb
Sanji and luffy had a lot parralels, zeff and Shanks are one them, the "you won't be repaying any debt by dying" also highlights that
There's a difference between an actual parallel and re using a moment
There's a lot of other examples that are obvious parallels since some characters bond over that, unless oda is gonna give a special relationship between Yamato and sanji there's like no point in making her starve to death like that
Maybe Yamato will have a special relationship with zoro and sanji and be closer to them than the rest because her past has some similarities to theirs
Until then, it's kind of a rehash