Wrong. Rather, natural explanations are the only scientific explanations for the origin of species.
Why have a beef with science being science? If you want supernatural or metaphysical explanations, look to religion or philosophy instead.
Wrong to you. Natural explanations are the only natural explanations for the origin of species. Science requires no necessity for a natural explanation. Such a statement would be one that belongs in metaphysics. Good science would accept the possibility of non-natural causes that were beyond it competence to study even while seeks natural ones. Do not mistake research methodology with ontological truth