In overpopulated countries is eating steak an inefficient way to use food energy?
To get a steak you have to spend a lot of energy on growing
plants as food for the animal that will become the steak. And
animals aren't that good at turning plants into meat, so you have
to feed them a lot more than they produce.
If you grow plants to feed to people directly instead, bypassing
the animal, the same amount of plants will feed a lot more people
than the animal did.