In this debate between if anime and cartoons are the same thing or not, what also has to be questioned is the angle this question takes. They are both animations that follow the same process of story, story boarding, animation, then to the screen.
Comparing their similarities and differences they are more similar than they are different. What has to be asked is 'does animation need to be referred to in subcategories?'
While it sounds a bit confusing, animation is a term that encompasses many art styles and art forms. Many things can fall under 'animation'. Flip books are a type of animation though it might take a moment to make that connection.
These differences in the creation stages separate what a persons creating. The story, the image, the meaning someone's trying to convey is all part of that process from getting an idea onto the screen.
Categories and subcategories keep things straight in the developmental and marketing stages but in the end they're animations.