This is always an endless discussion without regard to development of humans. There obviously is no prove that the creation as described in the Bible or other religious documents, ever happened, But the question remains why was religion ever developed in the way it did.
The answer is probably that the chaos created through the early thousands of years in mankind had to be solved, There always seems to have been a believe in natural elements on having a serious impact on human life - hence for example the early religious believes in the sun, moon and planets as gods.
By the arrival of ancient civilizations the need for some norms to organize family groups into tribal groups and even nations with similar tendencies and loyalties arose. The fact is that leaders then had to decide on what should be done to organize mainly primitive people to a more sophisticated level of development and a believe in what the leaders saw necessary to sustain itself.
That gradually developed into religious societies based on loyalty to what they believe in gods. It is also a way to explain why many leaders turned themselves into gods.
Through the centuries some "religions" got stronger by differing themselves from others and especially by conquest, Trade and connections with other societies also had an impact on religion.
Some tendencies also developed to mix up lawmaking with religion. Take for instance the eating of pork - in the colder countries it never was a problem - in the must hotter Middle East pork as a meat deteriorate faster than other meats - or so the leaders believed and they promulgated a health law that eating of pork is forbidden. It would not have been accepted as a normal law by the populace - so the leaders find a solution - make it out that the gods forbid it in the form of a religious law.
Through the centuries the Jewish religion developed into a believe in one God and the present major religions in the world are all off-springs of that religion. Christianity became a religion on its own - but was invariably influenced by other religions it got into contact with. The tribes in Northern Europe believed in a different set of gods and had specific "religious" celebrations - hence the introduction of Christmas as a religious holiday as an example - it was originally known as "Yule" in northern Europe mythology,
Islam as a religion was an offspring of the Jewish religion - but was also influenced by the earlier off-spring Christianity.
The main problem was that religion was used as a means of getting political supremacy in the world. Religion was used to get both political and economic supremacy. That has never changed throughout history of mankind. It became the reason for ancient warfare and establishment of empires and kingdoms and it persisted to this day.
Has religion still have a relevance in the present world environment. yes it probably have. The reason is that the world today have a situation that a huge percentage of the world population still has not reached a level of educational and social development that is required in society to make things work properly. Some norm for social cohesion is required to ensure the uneducated or lowly educated population do not destroy what science have achieved thus far.
The problem in the present world environment is that religion is used by politicians and religious leaders to enhance their own agendas. Democracy - branded as a poor form of governance by the ancient Greeks themselves, is enhancing the usage of religion as another means to influence the uninformed.
It is used by unscrupulous politicians worldwide for their own purposes and it does not mean that any specific group of leaders are exempted from using it.
Is there a religion? There is a believe that religion in fact is a believe inside people to live in peace with their neighbours and all people, to help others as much as they can and to enhance love and friendship as far as they go.
Some serious thoughts on the question about religion remains. The reason for pitting the situation of science as an alternative to religion is a futile mythical question that can never be solved. It is at best a discussion between educated people - not a discussion between the highly educated and lower levels in society where religion takes precedence over everything else.