It’s easy to demonstrate the irrationality of this evolutionist argument with an illustration taken from nature.
We know that the largest tree on earth is a giant Sequoia, estimated to be over two thousand years old. At least 97% of its mass is considered to be inanimate.
So no one living today could have observed the generation of that giant. Yet, no informed person would argue that just because the millions of tiny winged seeds it yields did not exist prior to the leaves, twigs, branches, trunk, and roots, therefore no parent Sequoia seed existed prior to the birth of that giant, and that no parent seed played a creative role in its generation for the purpose of self-reproduction.