A lot of good points. Some better than others (I think we'll all get over the no showers thing).

This game is full of unexplained plot holes, villains without motive, and an excess of characters making you feel less and less for each one's individual story. I also like that with every point you come up with, most retorts consist of "Dude, it could have been..." or "Calm down, it's a fantasy game bro", which is exactly the point I feel you're trying to make. The game does not provide any plot points to fill in these holes so it's all up to "the player's imagination" or speculation. That's called a plot hole.

Btw every FF game has these plot holes. I'm just making the point that they're more heavily criticized in other games because FFVI is a favorite.