Correct, you did not mention ‘creation science’ or support it. It was just a general example of bending the rules of science.
Christian morality is not a matter of natural sciences and there is no need to push it into a question of natural science, although it may matter much for an individual researcher. It is a theological question and theology is not science.
In nature, reproducing individuals produce offspring that resemble their parents at a general level but not in detail. An exception is clonal multiplication. Look at any family with many children: there is some resemblance between the kids and the parents but the children are not copies of their parents.
Through generations, the appearance of the offspring may change so that the children differ visibly from their distant ancestors. Let that happen through millions of years and you may get offspring that differ from their ancestors so much that they are classified as a different species.
Does that happen without a Creator? The answer is a matter of belief.
My answer is that it happens through a mechanism that God planned when He created this kind of universe. It is part of a world that is described as ‘good’ in Genesis 1.
If God created this kind of universe that operates within the known laws of nature, who am I to criticize God for not creating in a way I would have chosen. If I would know all the information in the universe, maybe I would also conclude that this is the ‘good’ way.