It's often a stereotype or an aesthetic choice. Sometimes, it's to create a certain idealized image of beauty, but it can be misleading and not represent reality.
The reason could be that certain artists or creators follow conventional standards. This depiction doesn't consider the variety of body shapes and sizes. It might also be influenced by popular culture and media that have perpetuated this one-sided view for a long time.
Nuclear family is often shown as a harmonious unit with parents and children sharing close bonds and daily activities.
There are various options. Women can work as illustrators for children's books, create comics for online platforms, or join animation studios as character designers.
Thin objects in cartoons can be like needles or slender antennas. Thick objects could be things like huge monsters or chunky vehicles. The choice of what's considered thin or thick depends on the artist's imagination and the story being told.
If you like the type of ancient novels such as Cloud and Soft Waist, you can try the following similar works: The Daughter of a Traitor, My Young Man, Playing Song, Four Seasons Sweet Yard, He's Daughter, and so on. These novels are all ancient novels. Although the plot and story background are different, they may suit your taste.
The cartoon of a dog training with a stick could present various scenarios. It could be the dog enthusiastically following the instructions from the stick, or it could show moments of frustration for both the dog and the trainer. Maybe there are cute expressions on the dog's face as it tries to figure out what's expected of it.
Rather than using this inappropriate phrase, we could tell stories about women who are breaking barriers in sports or achieving great things in education.
Maybe it's for adding some unique or comical elements to the character. It could be a creative choice to make her stand out.
Often, very thin cartoon girls are drawn that way to fit certain stereotypes or to create a certain look that is considered fashionable or ideal in the artistic style. Also, it can make the character stand out and be easily recognizable.
Maybe it's because society sometimes has certain standards of beauty, and thin girls are often seen as that. But it's not always a fair or accurate representation.