So it turns out the Game Theorists channel has a video, that I haven't even watched, just so you know, about if Final Fantasy is anti-Christianity.
And it started to click.
Ever notice what summoning monsters are named and based off of?
Odin, Shiva, Baal, the only one I can remember the name of that isn't generic like "unicorn" or like that, is Alexander, and even then, he was one of the worshiped like a god sort of leaders.
Another theme present from the very first game, crystals. Crystals are, as you may know, a part of new age religions, and the concept of magic crystals being a macguffin, or used to summon previously mentioned monsters, can be singled out through the series.
boss of the first game is a "demon king", second game's villain is an emperor who split his soul
and dares to try to rule over heaven and hell, in FF IV: The After Years, you fight a character called "the creator" who well...Take a guess of what is going on there. Sephiroth, literally wants to be a god, and to destroy the world. FF8, time traveling witch possessing a woman and wants um...Time compression? more than one boss across the serious that wants to make the world into nothingness. the villain in FFX who is a church leader who wants to "become sin" (which the sin they talk about is...a giant flying whale.) In 13, the boss is a creature that plays god with every man woman and child in it's domain, branding some, who will turn into monsters if they don't do it's will, and if they do what it wants, they are in-cased in crystal to..."live forever". Even in tactics, villain is "the bloody angel", one boss is worshiped as a "saint", Legends 2, with bosses named Venus and Apollo...I could go on, I literally was finding some of this out right before I wrote it here.
And of course the obvious occult symbolism in magic, and how heavy on magic these games are, but seriously, even the main plot of games can be a little suspect. (cloning, FF7 and FF9, corrupting objects, FF tactics, crystals to save humanity, multiple games.)
There was some stuff I didn't even mention.