The point being is that I don't conclude mutations will keep happening simply because they have happened in the past. There is much more to it. We understand the underlying chemistry and physics that produces mutations, and from that knowledge we can predict that as long as those conditions persist you will have mutations.
IOW, we understand the mechanisms behind the emergent property. The same can be said of morality. We understand how empathy, logic, and reason work, and how they produce the morality we follow. We don't, or at least we shouldn't, proscribe to the reasoning that just because someone says we should do something that we should do it. We have the responsibility of using our ability to reason and empathize to determine if what someone orders is moral.
I changed the emphasis of your post to indicate what I'm focusing on.
In short I mostly agree with your first paragraph and disagree with the second. However, based on the comment you made earlier - the one I called "intriguing" - I understand why you would say what you did.
WRT DNA mutation, you have created a model that correlates well to the data you've collected (of past events). It allows you to create cause-effect chains such that you can predict the future with much higher accuracy than you could without the model ... as long as the conditions persist ... as long as the chemistry and physics persists. Obviously the best bet is that it will continue, but the point is that there is no LAW - some Form with eternal existence apart from the material universe. You're simply placing your bet where experience tells you to place it.
Whatever "model" people may be claiming for morality, it isn't nearly as reliable as your model for DNA mutation. Not even close. In fact, the nature of the model is completely different. Your DNA mutation model, as you indicated, has been deconstructed into the principles of chemistry and physics. Models of morality, at best, can only be called empirical. Whereas theoretical models rely primarily on first principles, empirical models rely primarily on evidential trends - a track record.
So, I agree with your characterization of the understanding of DNA mutations, but disagree it can be extended to morality in the same way. The two situations are different except for one thing - that they are both fundamentally based on an observation of trends. The first allows a theoretical model. The second only allows an empirical model. As such the first model is a better predictor of the future than the second.
Yet at their root, they both assume a reliable track record ... and that's what I see in God.
I suppose there's no harm in trying to develop first principles for a model of morality, but I don't think it will succeed. I think the model will forever remain empirical; morality will forever depend on things like trust and obedience. The reason I think this is because it appears to me that morality is separated from the necessary first principles by emergent phenomena.