Rebel Moon final trailer

[BloodSquirrel]

But if the bear has to use several billion times the energy it gets from eating the trout to catch every trout, that's a reason.

There's a massive difference between a WWII ship needing the food from a small farming village and a space opera starship needing food from a small farming village.

Energy doesn't just magically turn into food. The ship needs food. It's been out on deployment for longer than was anticipated, and their logistics network is too distant/stressed to supply it. They can't just redirect their powercore into the dirt to make harvestable crops pop up.

The difference between the power output of a WWII carrier and a spaceship is irrelevant here. Neither one is capable of producing food, regardless of how much more powerful it is than the primitive farming community nearby.