Actually, like in other worlds, the Earth has magic, and the people of the Earth just didn't explore this side of their world.
Earth's people could only see magic on television, in comics, video games, or novels, believing magic only existed in fiction.
Although humans have become the most dominant species on this planet, as they have also become by far its most intelligent, imaginative, adaptable, and resourceful species, none of them can cast extraordinary powers or possess supernatural abilities.
Aside from the fact that they don't actually need to have such powerful abilities since creatures like dragons don't exist in this world, technology has made possible so many things that people do not have to rely on magic.
