^ This is my point exactly, I never really felt that Sin was going to wipe out Spira, just meander around causing destruction like any other natural phenomena like Earthquakes and Tsunamis. Spira's healthy population levels and prevalence of different races tell me that the people have adapted and survived and thus Spira is in no real threat of total annihilation like they were when ExDeath took the Void or Sephiroth summoned Meteor. Throw in how much Sin is one of the least proactive "death machine" in the series and at this point I feel the people are whining. Its not like other FFs where I'm racing to save the world from the worst case scenario or seen it come to past and am now trying to save the last little shred of it. Sin appears causes some problems, gets destroyed, comes back. Just like any other natural disaster.
While that's true, it's tied up in their religious beliefs that this can actually go away. I know that we in America (I assume you're American) don't feel much fear of this, but if the people sincerely believed that tsunamis would go away if they prayed really hard, it'd be seen as a lot more urgent to defeat. This is the whole reason why messianic beliefs are so prevalent. I guess that total annihalation is worse than Sin, but Sin, being ongoing and (apparently) stoppable, makes it kind of sad.
Pyreflies are the remains of the soul and they gather in the Farplane. Yes you can't visit your relatives but it was shown you know your relatives are there cause they can only take the form of the dead (hence why Tidus only saw his mother and not Jecht, despite the entire idea of summoning the souls of dreams is utterly ridiculous) and X-2 later confirms this even more by Nojima and Kitase hinting to the fact that the Farplane is like VII's Lifestream (despite the fact they came up with this idea on a lark in the middle of development of X-2 and the fact that both the Farplane and Lifestream are shown in each game to work radically different from a cosmological standpoint ). So it pretty much is the afterlife on the planet and its a scenic one as well.
That's true, the Farplane is real. That doesn't mean that everyone believes that, though. That's my point.
As for my views of death, I've just come to terms with it and treat it like any other natural phenomena. I don't see the point of fearing the inevitable.
That's very brave, but wait until death is at your doorpost and then feel strongly like that. That isn't mocking, by the way. And while I'm sure the vast amount of people in the world of Spira don't actively fear Sin for the same reasons you do not fear death, that doesn't change the fact that, when face to face with Sin, they might actually be terrified, inevitable death or not.