system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How come there are often some very obvious and jarring plot holes in big budget movies with hundreds of people working on them?

And most of the time they're easily fixable.

Didn't anyone notice? Is everyone afraid of the few guys in charge and won't say anything? Do they notice, but believe that most viewers are too dumb to care? Any other explanations left?
gpt
Some if not most is editing related. There might be a scene that further explains that reference or why that character said what they said but it gets edited out before the release. 

Usually this is studio pressure to shorten a movie or the editor never talked with the director (Also an issue on very large sets, director gets paid and peaces out).