Well, Dawkins and other prominent promoters of modern evolutionary synthesis usually say the opposite: we are working on it, they say, and we BELIEVE one day we will know the answers to what right now we don’t!
They even derisively call any religious explanation a “god of the gaps” argument.
Richard Feynman says scientists are responsible to avoid self deception. Being able to admit your just-so story is currently unfalsfiable and is actually more similar to a fifth grade writing assignment than to science, is part of that responsibility.