The theory has been made immune to empirical falsification because it is simply assumed to be true by default as the only viable option for materialists.
This phenomenon could rightfully be called a Tertiary Butterfly Explosion analogous to the Cambrian Explosion of animal phyla.
The lesson from woolly mammoth studies, and many other ones, is that it is much faster and easier to break or blunt a gene than to improve or make a new one.
The idea is to recreate some of the DNA from the sequencing of frozen mammoths, and inject it into an Asian elephant egg.
It is not like we Darwin critics make this stuff up. We just look at all the evidence and draw our conclusions.