At least, according to annunaki legend, humans were created through crude genetic engineering by annunaki alien species who came to earth to mine gold and left earth a long time ago. To create humans, they mixed earth hominid genes with annunaki genes, using cheap genetic engineering methods. That explains why humans have many genetic defects. They didn't create humans with precise genetic engineering methods because humans were designed as a tool to mine gold for annunaki aliens. That also explains why humans spent a lot of effort in mining gold and processing it into gold bars even though they were not technologically advanced enough to actually utilize gold. Nowadays, gold is used in computer chips. People didn't have computer chips in the past. There was really no good reason to spend so much effort on producing gold bars if humans didn't have natural use cases like computer chips for gold. Because annunakis didn't want to directly control humans through brute force, they gave the concept of money and government to humans so that they can indirectly control humans through money and government. They spent a lot of effort on perfecting indirect control. After they left, the human controllers who controlled humans for annunakis kept money and government. The legend says they themselves don't use money and government to coordinate their own labor. They give the concept of money and government to slave species.
If annunaki aliens took some humans with them after they were done with humans on earth, there must be humans on other planets.
But, whether annunaki legend is real doesn't really matter at this point. I don't really care either way. What matters is the fact that I'm stuck with money and government on earth along with other earth humans. I'm still practical and try to be productive with money, but I am aware that money is a control mechanism.