I susepct a mild varient of the AAH is probably true. There is a problem that needs solving: why can humans swim (and many do so for fun), while other hominoids avoid water?
I doubt if there was a ever a time in prehistory where the ancestors of humans were all living an aquatic lifestyle, but there must have been many occasions where a band of pre-humans lived on the shores of a lake or ocean. Some of these individuals would have used the water to find food or escape from predators, and I hypothesize that this happened often enough that evolution would have changed our psychology and anatomy accordingly.
True because good policies can have vastly differnet outcomes than bad policies.
And plenty of things the market can do better than the government.