If what she said sounded like a "might" to you then I don't know what to tell you because you're clearly not arguing in good faith. She clearly said this is going to happen and this isn't; the only "might" was that they might cut her costar entirely (which just reinforces the comment about not being saved). People are not wrong to take information presented to them as something confirmed as confirmed. And you intentionally shift the analogy to bread choice instead of filling to make it seem more inconsequential: she's talking about the main character of the film. If that's the bread, what's the filling?
Dozens of movies open every year and Disney has to compete for their attention. People have this weird idea that people are obligated to give Disney more attention than normal; normally, when you see a film that is clearly heading in a direction you don't like, you stop paying attention. You don't keep watching it to see if it might turn around into something you like. Huge, visible changes can change minds (e.g. Sonic), sure, but that's not what happened here.
If Disney's marketing plan is to hope people give them a bunch of chances and keep checking in on the press releases to see if the movie has entirely changed course, then good luck to them.
If their marketing was supposed to contradict what was said wasn't going to be in the film/was going to be in the film then I definitely missed it. I definitely didn't see anything indicating a guy saving her or indicating they dropped the leadership thing.
Maybe if you're really following closely it was there, but I have no reason to do that when there are dozens of other films to pay attention to and it's already been made clear to me that this film is not going to be something I want.