If You Demand Magic, Magic Won’t Help” where he says at one point: “The worst catastrophe you could visit upon the New Age community would be for their rituals to start working reliably, and for UFOs to actually appear in the skies. What would be the point of believing in aliens, if they were just there, and everyone else could see them too? In a world where psychic powers were merely real, New Agers wouldn’t believe in psychic powers, any more than anyone cares enough about gravity to believe in it.
https://www.lesswrong.com/s/6BFkmEgre7uwhDxDR/p/iiWiHgtQekWNnmE6Q?fbclid=IwAR3xEBpBr_U_3sn_kVPvVbzYyq_6dDn4kzXDtSCgeFR6qgXl3dGXPWftIyo
ah, someone found it: