How could Man be a privileged species?

There is a view that Earth was specially prepared for mankind. Why would what appears to be no more than a small molten-rock ball, with a permeable cover allegedly capable of being made to slide over the interior by powerful external forces, be waiting to provide a home for mankind?

Since complex organic compounds and bacteria have been found in space, could it be possible that fully-formed humans also came to Earth from ‘up there,’ as claimed in the folklore mentioned in a recent post? Or, were the arrivals from space (the ETs, extraterrestrials) advanced beings who merely ‘seeded’ (impregnated) Earthlings, thus allowing the descendants of their progeny to believe that they had ‘descended’ from ‘up there’? This then raises the question: how did these Earthlings come about?

Sumerian writings, drawn upon by the authors of the Bible and by Zachariah Sitchin, say that ETs from planet Nibiru created ‘the Adam’ (mankind) by implanting their genes into an animal species on Earth. This allegedly occurred 300,000 years ago, almost 145,000 years after their arrival – so said Sitchin.

Is there any point in asking how motile air-breathing animals initially arrived on Earth? Do we know? And how they evolved into the species allegedly manipulated by the Anunnaki? That all life forms on Earth share a gene pool, except for the 223 exceptional genes (refer Sitchin) not found in species other than Man; and that the genetic difference between chimpanzees and humans is only about 1.4 %; suggests that we did all originate on Earth.

If Earth is compatible with humans, then it is also compatible with the bacteria, the vegetation, and certain life-forms which enable us to survive.

Our morality does, however, suggest a close link with the carnivores in the animal kingdom, except that we will kill fellow humans and other animals even when we are not hungry for sustenance. Yet, our ethereal souls can uplift us to great heights, offering hope that we can repeatedly recover from each cosmic cataclysm; that is, that the human species will earn its right to live on Earth.