Because God, who created us, has a mind far greater than ours.
Rand was apparently unable to see this.
A mind, in one way or another, seems to be present in every living thing; even if only to maintain life ... as in every bacteria in existence; and we're somewhat related to those bacteria.
Jones writes this: "About a thousand genes are shared by every organism, however simple or complicated. Although their common ancestor must have lived more than a billion years ago, their shared structure can still be glimpsed. It shows how the grand plan of evolution has been modified through the course of evolution.
Jones goes on to write: "One set of genes is found everywhere. It translates the information coded in the DNA and allows it to make proteins. The job is so essential that such structures changed little over millions of years."