This thinking is far too anthropomorphic and 'colloquial'. DNA is both functional and purposeful. In fact, all natural process is both functional and purposeful (I digress).
You make this claim, but fail to provide evidence that it is actually 'purposeful':" in other words, that there is intention behind it.
But as we come to understand how it functions, this does not really help us to understand the purpose of this functionality. The result of the function of DNA (the continuation and variation of life) is presumably the purpose of it's functionality. But this doesn't really tell us anything because it doesn't tell us why the continuation and variation of life forms is a 'goal'.
You are assuming there *is* a goal. And you do that without any reason for assuming such.
Faith is not about having "confidence" (i.e., 'belief'). It's about trusting in our hopes enough to act on them when we do not have the confidence of belief.
So it is action because of hope? That seems an unusual way to define it, but sure. In that case, how is it relevant to our discussion? What does it have to do with moral values or justifying such because of consequences?
Answer: absolutely nothing.
Are they? That's not really how I have found that life works. I have found that intuition is as good as, and very often better than an "educated guess" based on partial and nearly always biased "evidence" when it comes to taking action in the face of the unknown. Intuition is more immediate and inclusive, and so less inclined toward bias.
In that case, I would simply say that you are very lucky. I have found intuition to be *much* worse that evidence based decision making.
And, contrast to what you claim, the fact that intuition is immediate and 'inclusive' is *precisely* why it is overwhelmed with bias. It is the biases making the decision in that case, not rational consideration of the alternatives.
I never interchange the words faith and belief. I am CONSTANTLY pointing out to people that these terms are NOT referring to the same things. And I am constantly explaining WHY they are not referring to the same things. But few will listen, because their bias is being served by their remaining ignorant.
And I would simply say that if you have to explain this to most people, then it is *you* that is using the word incorrectly.
Faith neither seeks nor requires any justifucation. It is a choice we make based on hope. Our hope and our unknowing are faith's justification.
Which simply means there is no actual justification, only our own biases and feelings.