See this study, which is consistent with your thesis: https://www.eurekalert.org/news-releases/814485 https://www.eurekalert.org/news-releases/814485 Essential

See this study, which is consistent with your thesis: https://www.eurekalert.org/news-releases/814485 https://www.eurekalert.org/news-releases/814485 Essentially, it claims that modern humans and our ancestors starting with Homo habilis were primarily carnivores for 2 million years. We moved back to an omnivorous diet starting around 85,000 years ago after killing off the megafauna, is the hypothesis.