Nearly every civilization found in ancient times had some sort of religious belief. Why should we shy away from something that is almost natural for humans-to believe in a metaphysical world?

Religion can easily be corrupted. In the hands of the wrong people (orthodox clergymen, monarchs etc.), Religion can hinder society from progressing forward. I understand this concept, and I agree with you. However, I do not understand why there must be NO religion at all. It seems to me that most Atheists (well, at least in the r/atheism) wants a religious free-world. But, almost every ancient civilization ever discovered had some form of religion, based on scripture or nature, polytheistic or monotheistic. It speaks of human nature, that we strive to believe in a metaphysical and spiritual world. Its natural for one to believe of a greater being. So why should we get rid of it?