Had the scientific community listened to the evolutionists who described this as "Junk DNA", we wouldn't have these cures.
So much for he predictive usefulness of evolution.
Actually it was the geneticists who said it was junk. The evolutionary biologists were the ones who said that the intron regions were conserved, and therefore, not junk.
Evolutionary biology provides the only current way to look at DNA as functional or not based on whether the region in question allows for rapid mutations. Functional areas of DNA are more conserved in general.