5. I think it spruces-up a rather drab and dull existence
If you know some arcane knowledge or a cabal hidden conspiracy then you get to look at everyone else and tell yourself you're smarter than they are. But knowing pi to the 200th decimal place isn't nearly as exciting as knowing the earth is going to end. Of course, once they're emotionally invested they're intractable. To disprove The End or dismiss The Grand Conspiracy is to forcce them to realize they were really quite ordinary after all.