Commercial enterprises stand on the shoulders of lax copyright laws. For example, foundational Disney works would have been illegal for them to make under the copyright laws they have since purchased.

https://drewdevault.com/blog/Alice-in-Wonderland/

Copyright is a textbook ladder pull.

What copyright law helps them? They have the least to worry about copyright as even if someone copies the movie script or something it's not like their views will be gone because of that.

I am not against trademark. e.g. Disney has a right on who can sell Mickey Mouse figurine, or Marvel has right over Iron man character and franchise.