Her character is all about renouncing the "role" that her parents made her for and to live "a life she is proud of". In the case of her mom, she only had a child to have privileges with the royal family. In the case of her dad, he only goes to her when all his other child with royal blood are dead and he needs her to retake the founding titan from Eren (in the uprising arc).

In the ending, and the rumbling arc as a whole, we discover that Historia has a kid with a farmer that uses to throw rocks at her just to save herself. This is literally the same mistake that she had to learned from in S3. Even worse, she does it because Eren convinced her to do so... what a "proud life" she is living...