How is everyone in the world not atheist?

I grew up Christian. Ever since I was 5 years old, I never understood the bible and my questions about it drove my childhood church leaders up the wall. The bible makes no sense, and neither does any other religious text.

Spirituality I understand to a degree since there's a sense of comfort there for dead loved ones, but anyone who can read and has common sense should be able to pick up on the contradictions in all the religious texts. I respect religions and people who follow them, unless you're using it to oppress others. I know it's harder when it's ingrained in someone's upbringing, but I just don't understand how other people turn to religion when we have explanations for everything with scientific and psychological studies and math.