Early animated films are seen to be based on print comics due to the fact that many people, especially in the U.S, enjoyed reading comic books. This is because it gave a moment of peace for those who read them as they were in a time that was dealing with war. By creating an animated film based on print comics, it brings an audience that has already familiarized themselves with the characters.
In the modern world it allows for both already existing audience members aware of the story and characters to admire and those who never took interest or heard of the story be able to experience what the story is about. Using what has been written and adapting it into a show and movie all while following exactly how it starts and how it ends, gives a connection between those who worked on it and those who watch it. This is because it’s something the audience can appreciate about the work that has been put into making something they’re able to relish in.