OP. No, we do not need to believe in a god. If anyone does then that is their choice. We all grow up and in our teens decide whether to follow a religion or not.
I could spend all day offering examples of ridiculous claims that made me see the light. The most stupid one to me is when it is proclaimed that a baby is a gift from god, but if that child is born with any sort of abnormality or even if the infant dies, it is believed that god has special plans for that child. How unbelievable is that? If you think that is a good and kind god than I feel sorry for you.