humanity is not important

Atoms in the human body: 7 x 10²⁷
Atoms in the human race: 5 x 10³⁷

Atoms in the universe: 6 x 10⁷⁹

Atoms in the human body / atoms in the universe: 1 x 10^-52
Atoms in the human race / atoms in the universe: 1 x 10^-42

Zero percent of the atoms in the universe are used for humanity.