Why do they do this? We all know for a fact that the universe sprang from a point of singularity which expanded greatly. And then conditions were just right on some planets for life to spark into existence. Somehow that first simple life form became able to reproduce. Then it evolved into mankind and all life on earth. It's fact!
Why don't we just look at experimental results. I mean, it's a well known fact that you can mix the right combination of chemicals together in a lab, and zap it with electricity, and a functioning, reproducing cell will result. And that cell will then reproduce, and through random mutations, form into generations of increasingly complex lifeforms until it culminates in the 1985 Chicago bears. Looks at the experimental results people! Scientists are smart!
/sarcasm
No, no, no its much more realistic that one almighty, all-seeing, all-loving deity created the entire universe in 6 days. Decided to kick back with two of his greatest friends, himself and himself, for a cold beer on the seventh because he was tired from all the work. Decided the world needed some sort of species to look like him so he took clay and dirt to make this being. But that wasnt good enough, this really stupid god-like being needed another stupid god-like being with longer hair. So this deity took the 13th rib from the first stupid god-like being and created the long hair god-like being.
But this deity wanted to keep these two god-like being from being critical and free thinkers. It loved the fact they were stupid as hell and couldnt question their existence. But he wanted to test them so he created an apple and said dont eat this. But because these stupid god-like beings are not actually god, and god actually messed up when creating them on accident, they felt intrigued by this apple. Then a talking snake showed up out of nowhere and told them to eat the apple. They didnt understand what this creature even was or that these creatures dont talk, so these two stupid god-like beings were confused and ate the apple. They then became really embarrassed because neither of them had clothes on, even though clothes werent even a thing yet. And the deity told them well now that you are smarter, I cant help you anymore and if you mess up I will torture you for eternity in a pit of fire.
Couple thousand years went by, including a flood that killed every god-like person, now called sinners, and every animal except for two on Earth because this deity wanted to start over. Two kangaroos traveled thousands of miles to get on this boat. Two penguins from Antartica did the same thing. It was quite remarkable actually. So after this deity killed everyone to start over he decided to make a loophole for his mistake, so he sacrificed himself to himself and everyone was saved, except for the folks that were born too early in history, they are being tortured for eternity. Yay! This is way more realistic than your stupid theory!
Sarcasm