Maybe it's revealed later, but the nautiloid's tendrils looked like they just grabbed people and put them in the pods with all their stuff. IIRC the PC starts the game with a Revivify scroll, which is a 3rd level spell, so they don't take all magic items. I know the obvious answer here is "balance reasons", and I'm mostly just nitpicking, I just have a really fundamental dislike for this style of character backstory in D&D and every one of the main companions suffers from it.