Forgot to summarize the actual point:

Even though Bigfoot, UFOs, alien visitors, and ESP are absurd notions with imaginary research supporting them, they are not beyond actual scientific study. Bigfoot is a scientifically analyzable concept, as is the evidence for it. It may be hoax, but we can examine even faked evidence.

Same for the other absurd ideas. OTOH, God is beyond scientific research. It's the epitome of supernaturalism. Science does nature. It doesn't acknowledge supernature, let alone dispute within it.