Not all scientists believe this. I have a doctorate in biology, and absolutely do NOT believe in human evolution. When I present this topic to my students, I tell them that I am not here to tell them in no uncertain terms that human evolution is a FACT. I present to them the major theories regarding the beginning of human life on earth, and tell them to make their own decision on what they believe. I only care that they can intelligently back up their belief, and are knowledgable about the different theories.
Because I teach at a secular school, I’m not able to “dictate” religion, and must be “tolerant” of multicultural backgrounds and beliefs. I do stress to the students that no human being alive knows exactly how human life began, and to beware of anyone who tells them so.
I do take heat from the other faculty members, and many look down on me for how I present the subject. They assume that you cannot be a good biologist if you don’t accept human evolution as fact. I do the see rationale of evolution on a genetic level (genetic drifts and shifts), especially at the molecular level and in bacteria/viruses. Oh well. I’d rather be seen as a “poor” biologist than to go against my belief that human life is sacred and that we were created by God in His own image.