Western societal ideals have always been broken when it comes to animated content. First, there is the core element that states when you are no longer a child you leave childish things behind and grow up. Adults aren't supposed to like the same things when they were children. Kids drink juice boxes. Adults drink coffee. Kids watch cartoons. Adults watch TV dramas. It's not okay to retain your childhood because that means you aren't responsible. This infects the entire scope of western animation production because it is a core principle that we perpetuate. If you liked Toy Story when you were a kid, it's only valid to look back on it with nostalgia as an adult or share it with your kids. Watching it alone, however, is deviant. Cartoons, after all, are for kids.
Adult animation is an alien concept to much of Western Society.