gungsnake puts almost everyone on ignore when he cant ccept their views.
"Directed Evolution" has become a biotech industry term that is common lunchtime talk daily.
I don't know whether you are kidding or are serious about doubting the the developments in many technologies that are evolutionary theory based.
One teeny area I use daily is the genetically developed enzyme that is based upon the response that one bacterium has to rare earth e;ements. The enzyme, developed from the trans RNA of a specific bacterium, allows me to sample streams and see whether theres ny Lanthanide elements in the water coming from upstream. Its a technology that has blossomed in everything from medicine to forensic sciences and is only about 15 years old. (remember how pregnancy testing involved using rabbits and urine?) This was one of the first areas of applied "directed evolution which later became a tool to develop whole batches of enzymes that have utility in so many areas that you probably use one and don't even know it.
Many sensors in car electronic systems use emzymes that respond by developing a color that can be sensed by a kind of laser which transmits the sensor iformation as a color change and lets you know that your oil is getting crappy..
There are hundreds of mdicines that require pplication of macro evolution to develop. There are also bacterial and Advanced plant resistances to enzymes, antibacterials , and ag chemicals like GLYPHOSATE. (Not all information on applied evolution is GOOD NEWS you know)
Geologists use evolution to help us pinpoint energy supplies. We use conodonts and foraminiferans of specific species that occur in several development clades
We know that these critters have an affinity for the original organic "mattes" that developed the oil and gas reserves (as well as the migration sediments). When we drill, we usually NEVER hit the exacat horizons o but we can hone in on the optimal zones by knowing the evolutionary sequences of these forams and conodonts. (Its a tool).
We use fossil genes to track the development of characteristics of living species (like Arctic fish or mammals). We can tell where their populations originate ,just as we can trace our own ancestral migrations by the "fossil" genes in our own species.
The problem with thi type of inquiry ("of what use is evolution" is that there is a broad based perceived irrelevance of what evolution is about.