They fear it, because purpose points to a super-intelligent Creator. Therefore, evolutionary theory requires total randomness in everything made. Yet all about us we see purpose in everything. The animal is given legs, eyes, ears, and marvelous internal organs. Everything is purposive.
Nothing is random or haphazard.
Everything is wonderfully designed. Only God can make a tree, a butterfly, or a hummingbird. And when He works, He does not work in a confused manner. He made many different kinds of creatures, but each kind is special. We can be thankful we are special to Him also.