“A long time ago, in an African savannah far, far away…”
Although there’s plenty of aliens in the Star Wars canon, most of the main heroes and villains look human. But why human? The universe existed a long time ago, in a galaxy far, far away. In that context, it would make just as much logical sense for these characters to look like elephants, hippos, or rhinoceroses as it would for them to be human.