This is an absurdly credulous take. If we took this face value, then we'd have assume that Carl Sagan really did keep an invisible flying dragon his garage.[0] This position is the exact opposite of rational thought.

Say it with me, "Extraordinary claims require extraordinary proof."

Even famed psychonaut, and inventor of the self-transforming machine elves meme, Terance McKenna said the only way to prove that it wasn't all in your head was to ask the elves a question that was easily and objectively verifiable, but you didn't know the answer.

He couldn't do that. He said so. He still publicly said that he believed they were real transdimensional intelligences, but he made no qualms about the fact that he had no proof, they're just a hallucination was very real possibility. (They are.)

[0] https://en.wikipedia.org/wiki/The_Demon-Haunted_World#Dragon...