All scientists (that we know of) are indeed human and therefore have beliefs, biases and blind spots. But the power of science is that -- contrary to the assertions of creationists and postmodernists -- it can paint an accurate picture of the universe in spite of human weaknesses. Science cares little for personal beliefs; it requires only evidence. If you propose a hypothesis, and it is supported by and continues to stand in the face of the scientific evidence, then it doesn't matter what belief system you come from -- you have a scientific theory. Evolution is an example of such a theory; it is supported by all kinds of evidence: geological, biogeographical, genetic, embryological, anatomical, and ecological.
So-called "scientific creationism," on the other hand, continues to exist despite the scientific evidence. The idea that all living organisms were specially created is a purely religious belief, held only by people of certain belief systems. There is no scientific evidence to support it. Indeed, there is much scientific evidence that contradicts it. For instance, the fossil record clearly shows forms changing radically over time, and our genes, even the non-functional ones, exhibit uncanny similarities with other animals. Evidence like this provides the impetus for the dogmatic statements of belief that creationists, like those in the Creation Research Society, are required to sign. Statements of belief allow adherents to maintain their beliefs, even when the scientific evidence contradicts them.