The meat wasn't wasted. Bone marrow is very nutritious. It was just more
from the carcass.
See, for example
<
https://en.wikipedia.org/wiki/Bone_marrow_(food)>
https://www.journals.uchicago.edu/doi/full/10.1086/701477
Origins of the Human Predatory Pattern: The Transition to Large-Animal
Exploitation
by Early Hominins
Abstract
The habitual consumption of large-animal resources (e.g., similar sized or
larger
than the consumer) separates human and nonhuman primate behavior. Flaked
stone tool use, another important hominin behavior, is often portrayed as
being
functionally related to this by the necessity of a sharp edge for cutting
animal
tissue. However, most research on both issues emphasizes sites that
postdate ca.
2.0 million years ago. This paper critically examines the theoretical
significance of
the earlier origins of these two behaviors, their proposed
interrelationship, and
the nature of the empirical record. We argue that concepts of meat-eating and
tool use are too loosely defined: outside-bone nutrients (e.g., meat) and
inside-bone nutrients (e.g., marrow and brains) have different macronutrient
characteristics (protein vs. fat), mechanical requirements for access
(cutting vs.
percussion), search, handling and competitive costs, encounter rates, and net
returns. Thus, they would have demanded distinct technological and behavioral
solutions. We propose that the regular exploitation of large-animal resources—
the “human predatory pattern”—began with an emphasis on percussion-based
scavenging of inside-bone nutrients, independent of the emergence of flaked
stone tool use. This leads to a series of empirical test implications that
differ from
previous “meat-eating” origins scenarios.