Why would Kevin Smith do this to his child...?

I finally watched this all the way through and could only arrive at my title thought. I like most of his stuff and didn't even know he had a daughter until on Comic Book Men where she wore some belly shirt that she kept awkwardly pulling down.

I don't get why people like Will Smith and Kevin Smith --realizing now the coincidence--put their kids in absolute garbage just because their kid wants to be an actor. Why wouldn't they give them something awesome to establish themselves regardless if daddy made it? Kevin Smith gave them bad dialogue and asked them to randomly use an accent that they had no clue what sounded like. The Depp kid was an afterthought in every scene but this made sure both her and Harley will follow in the same footsteps as Jaden and Willow.