They try. You wouldn't believe what sweet-talking the mess chief'll get you in a pinch, though.

[He's joking, though. He doesn't have a problem eating what the rest of his crew survives on. Synthesized food is becoming more and more popular, and the options for sustenance are increasing with it. Maybe one day they'll be able to push buttons and have magical steak appear. Wouldn't that be a thing.]

Actually, it doesn't bother me that much. Food's food.