I brought this up, but its actually even weirder...
Because not only does every Companion have something strange going on, but they all have a significant outside force effecting them... which is weird, considering the main story is about the mind flayer tadpole, and the absolute, doing that to the players.
I think one way they could mitigate this a bit, is to say people like this were intentionally gathered for some reason or another, that the fact they are all a bunch of weirdos is not a coincidence.
