At the end, when Rick is towing back the Earth with his cruiser, the planet and the spaceship are nowhere near to scale. Also, Earth has stopped rotating and been subjected to extreme forces of momentum to change its trajectory, which would cause the complete destruction of humanity and all its structures.
Elon Tusk hypothesizes growing up with tusks created social challenges that raised his self-esteem as a child and his skills at collaboration. However, since every human in his dimension has tusks, he wasn't any different than others and wouldn't have had the challenges he discussed.