First of all, it's silly to equate canon in fiction with religious canon. Second of all, it's always a pick and choose, but it's just the developers doing the picking and the choosing. However, the developers often do follow the fans' opinions to an extent, which is why Fallout: Brotherhood of Steel (entirely) and Fallout Tactics (partly) were excluded from the official canon.
And everyone has a right to decide what he considers to be "true" in regards to the Fallout setting (or any other) and what he doesn't for the purposes of fan projects or e.g. PnP RPG campaigns.
But let's not divert yet another thread into the discussion of what is and isn't canon.
First of all, it was an allegorical example, not a literal one. I wasn't comparing one with the other, but rather illustrating the difference between what is official and what is apocryphal. There was no equating whatsoever. Secondly, you seem to be misunderstanding my opinion on the matter of "canon" and "fan preference". Fans are absolutely allowed to hold certain apocryphal things as true to add an extra dimension to their own work or experience, but at the same time they have to understand that those ideas
are apocryphal and subject to change. I could not like the fact that Khan Noonien-Singh was killed in Star Trek II but I can't deny that it happened. Canon is literally a framework: you can add to it all you want but the second you start taking away the support beams in favor of fancy wallpaper you're going to have serious problems later on down the road. Yes, the presense of FEV in Vault 87 is incongruent with what we know about Mariposa and such, but it's there and we can't rightfully discount the entire game as a mere "reimagining" or "fanfiction" because Bethesda are the authors now.
Also, as near as I can tell, this thread is specifically about what is and isn't lore so I don't think our discussion is diverting it significantly.