Maybe because having been made in the image of himself by god humans are the only living things that can achieve goodness and eternal life, hence the dubious moral consequence. Without the cachet of evolution (and the made in the image ..etc) we are all exposed as just animals. Thinking ones sure, but still animals. So if you have a problem with that and feel you are just a bit special you will have problems with evolution. Most people don't, certainly creationism doesn't get much of a go here.