Okay, I'll bite. Give three examples where they use the theory on a regular basis. I bet any or all of the examples can be answered by genetics, ecology, physiology, or any of the other practical sciences.
These disciplines are no more than stamp collecting without evolution. Every time you have a novel DNA sequence in hand, you want to know if it is found in other organisms, and its homology to other known genes. Some proteins can take on novel functions in different contexts.