I’m trying to think of the last big breasted horror icon that people took seriously, and I can only think of Lady Dimitrescu in Resident Evil.
But whether it’s Hollywood or video games, creators and the audience don’t seem to believe big breasted women are capable of being evil, angry, traumatized, lonely, regretful, guilty, or any of the other reasons to haunt the earth.
Every ghost and demon is either a petite woman, an old person, a child, or just a guy.
Chika from Kaguya-sama Love is War, is the exception I thought of immediately. She has big tits and other characters (rarely) comment on it but it’s not something that is important to her character, she’s not a love interest or intended to be particularly “sexy” and she’s got plenty of other stuff going on