Institutionalized religion is dangerous. Blind faith breeds ignorance, encouraging devout followers to live in sheltered bubbles. Routine makes way for stagnation, whereby potential character growth is stifled by familiarity and xenophobia. This contemptuousness fuels Final Fantasy 10's story.
FFX sowed my agnostic atheistic views no joke lol. It made me question my fayth. I love that FF has always been anti-religion, but they went ape shit with it in FFX. I love it.