What an amazingly inept statement.
So you believe there are only two possible positions: Evolution as it stands today is fact and never needs to be questioned or one believes life on earth was designed by space aliens.
Some of you evolutionist "men of science" seem to be ignorant of logic and the basic scientific method.
Questioning one theory does not impact any other theory (Per se)
Finding a flaw in one theory is not supporting evidence for another theory.
There is no requirement that one most have an alternate theory if one questions a theory.
Rarely are there only two possible positions on a subject.
Actually, there is such a requirement in the practice of science. Particularly when there is no sound argument against the currently accepted theory.
FWIW, I have no great doubt myself that evolution as we currently understand it remains an incomplete framework, much the same as can be said of a whole array of scientific inquiries. I personally consider it rather foolish when anyone suggests that our knowledge of the universe is more or less complete, and particularly disappointing on the rare occasion that a scientist implies as much.
But as far as the conceptual lattice of adaptive speciation under natural selection pressure there can be no reasonable doubt in my view.