Until recently, scientists called parts of DNA "junk", because they didn't know what it did.

Actually, scientists have NO CLUE what DNA does.
They still believe that DNA is what makes the body its size/shape/whatever.

They are still stuck in the everything has to be physical and there is no God, no spirituality.

And, with such blinders going in, they will continually fail at what they are trying to do and be very confused, because they can't see.