Why is recrafting by personal order only?

Public orders are intended for players who don’t care about quality level of their items, and just want them crafted. Any recrafting, or specific stat allocation, embellishments etc were meant to be done on Personal or Guild crafts, where players could communicate with the crafter beforehand.

Here’s a blue post from Jan '23 explaining this. I don’t think they ever officially commented again this specifically, but if someone does have another, they can find it.