BIG QUESTION: WHY did klingon appearance change???!!!...

Why did the Klingons all of a sudden look almost human in only 100 years? How is it that they lost their ridges, their power, and their warrior’s stature? Sometime in the 22nd century, the Klingons heard about humans creating genetically superior humans in the late 1990s. It was the same genetic engineering that created Khan and his people. They learned about a ship carrying Augmented humans that had crashed near the Klingon homeworld. Because they thought that humans were working on the way to overpower the Klingons and conquer them, they raced to the crash site and took the Augmented embryos to glean the DNA from them. Once their top scientists created a drug from the DNA samples, they tested it on a few willing subjects. The few volunteers that took this died agonizing deaths, even after they began showing enhanced characteristics. But it didn’t work as they planned, because they also showed human characteristics. Almost immediately, the cranial ridges disappeared, they became weak, and they contracted a flu-like illness that killed many Klingons. And because this drug affected the DNA sequences, it became a virus that continued for many generations of those who took the drug. The virus, known as the Levodian Flu, would have wiped out the entire race had it not been for the Klingons requesting help from Dr. Phlox on the Enterprise. Dr. Phlox managed to stop the virus from killing the Klingons, but he could not stop the humanizing effects of the virus. The Klingon High Council were afraid that these flat-forehead Klingons would become outcasts to the Empire, so they were the ones relegated to the “front line” of space as captains and crews of the Klingon Defense Space Force. By doing this, the “outcasts” would be assured of their place in the Empire. There were some Klingons who did not take the drug and were not affected by it, so they retained their original appearance as compared with others who did take the drug. In Kirk’s time, the Augmented Klingons were the descendants of those who took the drug in the 22nd century and survived the Levodian flu. The Discovery Klingons and traditional looking Klingons were descendants of those who avoided the drug in the 22nd century. Their ancestors did not get the virus that wiped out and changed Klingons as a result of the drug.