This ever get explained? Like I get primals return to aether, but a lot of other enemies also don't leave behind bodies.

I am not expecting there to be permanent corpses all over the game, but it definitely makes a point of showing most dungeon bosses as exploding into black smoke upon being defeated. At first I thought it was supposed to show their ties to the Ascians but that does not seem to be the case. Like why would the giant squid explode into black smoke?