This is bad science in and of itself. Good science does not discount anything, at least if it wants to accomplish something. I cannot imagine the truly successful scientists from whom we've benefited throughout history assuming the "non-existence" of something as they engaged in their practice. Good science is continually finding things it never knew existed, and it is continually modifying its assumptions.
I absolutely agree. And when science finds evidence of a heretofore unknown designer, it will modify it's assumptions. Not before.