Alternative Character Interpretation: Is Sinbad telling the unvarnished truth? Is he embellishing what happened? Or is he flat-out making things up for the sake of a good story? Considering some of the stories he tells flat-out copy other well known stories, it's possible the last one is likely. All of the above?
Values Dissonance: Sinbad, the hero, is trapped in a cave thanks to a literal Together in Death custom with only limited food and water. Fortunately, very soon after his 'burial' a living woman is entombed with her dead husband nearby, so Sinbad beats her to death and steals her supplies. This happensmultiple times before he escapes...which he could have done at any time, had he explored the cave a little more thoroughly when he was first entombed and discovered the hole by which he eventually escapes.
