The core of this thinking really de-values us as individuals.
If I am merely an animal, and am just a happenstance that came into being because of something called the evolutionary process, then:
I am not special, I am not created, I don't have a purpose, I am not intricately made, I am not unique, I hold NO value or worth, I am not an individual,
For me, the core of this thinking is empowering in the extreme.
If I am a sinful, infantile creation undeserving of happiness and life except by the grace of my absent creator ("Amazing grace...saved a wretch like me?" What an ugly song! I'm no wretch, are you?),
I am not my own person, I don't have free will, I am not responsible for my actions, good or bad.
It's like we're all irresponsible children waiting for a celestial parent to clean up our mess.
Instead, if we evolved, then I am a god! You're a god! Imagine it: we're the supreme beings on this planet, maybe even in the whole universe. We should all act as gods and goddesses. Then it's on us to treat ourselves, eachother, lower animals, and the environment with the respect and dignity the universe deserves. It's on us to be righteous and just for the sake of being righteous and just. How many people through their own weakness create disorder and chaos in the world with the hope or rationale that a god will forgive them when needed? In some respects an all-forgiving god that tosses out forgiveness like cheap cookies is as dangerous to the world as a vengeful god damning all infidels to death.
Atheism is beautiful.