A scientific theory is a well-substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment. A theory in the scientific sense doesn't mean 'guess' or 'hunch'. There is no dispute about evolution. In fact Islamic preachers have now realized they have no choice and are trying to fit it into Islam some how.You do realize evolution is just a theory? It has not been proven at all. Scientists have biases and agenda's just like us regular folks, you can't take everything as Gospel.
Besides, up until recently humans have always believed in some sort of creator. It is in our nature to believe and search for truth.
Humans have believed in some sort of creator and were making one up as time went by. This is not evidence that god must exist. Have you studied evolution? It's a pretty simple and logical process. Over millennia, species develop different features (mutations) and the ones that are suited for survival pass on their genes. For example there are people born with birth defects. If things changed on earth and these birth defects became useful for survival, that person would pass on their genes and become dominant in the gene pool. Super weird analogy but I'm trying to convey a point.