The meaning of the quotation was clear.
It is an incredibly bad reason not to look into ufology.
It seems good to me. Weather balloons, military aircraft, atmospheric phenomena, visual hallucinations, hoaxes, etc, aren't particularly important for most of our purposes. Alien spacecraft would be much more so. If the latter are sufficiently unlikely, I would need some other high-prior class of scenarios to justify spending effort on ufology (given past efforts, etc). And "the superintelligent simulators of the Matrix are messing with us using UFOs and will also arrange for marginal investigations to be fruitful" is not such a class in my view.
It would be useful simply to know that naturalistic explanations aren't enough. That knowledge severely affects your world model. Psi being real is also massive information even if we don't immediately know what to do with that knowledge.
[Post redacted 'cuz I unfairly and carelessly misrepresented someone's views (Eliezer's). The messages of this post was: disbelief that aliens visit Earth in spaceships is a bad reason not to look into ufology. My apologies for this ugly post.]