However our current inability to understand some facet of the universe does not cast the whole endeavor of verifiable, scalable, human understanding into doubt. Nor should the rest of us take seriously someone who chooses to fill those gaps with untestable fantasies or mythology, even if those ideas can't be definitely ruled out.
We can't rule out invisible pink unicorns. We can't rule out a tiny teapot in orbit around the Sun, between Earth and Mars. Belief in either proposition is unreasonable, silly even. Those ideas are unsupported by evidence and inconsistent with the knowledge we currently have. Not all ideas are created equal or should be treated as though they have the same chance of being correct.