Again, you keep on saying "I don't think it's necessary", but that is merely a straw man. No one in evolutionary science has every claimed that improvements must be "necessary" in order to make sense.
I have no idea how this is a response to my argument. I am not sure you understand the argument.
And, our ability to reason makes it much easier to hunt, grow food, provide shelter, etc. It separates us from every other species.
Well this is the same assertion you made earlier. You need to make a proper argument that there must be a strong relationship between our evolutionary development and the development of reliable reason, especially abstract reason, not just point meekly at a few possible benefits. Naturalism and naturalistic evolution are based on abstract and speculative reason. We need a good reason to think, therefore, if we are going to suggest our reason developed through evolution, that this process led to reliable reason.
One response to what you wrote is why would response to stimuli not account for what you describe just as well? As I said, when we withdraw our finger from a hot stove, we do not rely on reason, but a response to stimuli. And this response to stimuli is not the same as reason. Why could it not just as easily account for the survival of early and proto-humans?
Another response is that it seems possible that our faculties could be unreliable and still help us to survive in our environment, if they still worked to lead to our survival. It is not the accuracy of our cognitive faculties that is what makes them necessarily useful for survival, but simply that in our environment, with the rest of our needs, they happen to lead to survival. There has been no real link provided simply by saying reason might be useful for the situations you bring up.
Finally, naturalism and naturalistic evolution as theories are not supported only by the sort of reason needed to hunt. They are supported by an abstract, speculative reason that goes far beyond the apparent character of the world. It is one thing to talk about cognitive faculties reliable for hunting or making shelters, another to talk about those reliable for scientific and philosophical speculation. There seems nothing in your point that would provide a strong link between the reasoning you refer to and the sort of reliable speculative and abstract reason required.