Longer term surviving examples tended to have a higher meat based ratio largely because they lived on islands or in more marginal areas. However, looking at land area and population density estimates adjusts the ratio significantly.
Some of this needs to be inferred from things like Native American tribal densities and is further confused as diseases decimated native populations throwing off those density estimates. Still the idea of our ancestors eating a primarily meat based diet seems to be a mistake.
You’re telling me my snow-bound ancestors were eating vegetables in the dead of winter, prior to the advent of agriculture?
On top of this mercator projections seriously distort people perceptions of how much land is near the equator vs the north. Africa is 11.73 million square miles with minimal snowfall outside of a few mountains, Europe is 3.9 million square miles. Combine that with warmer areas providing more food and it’s likely the majority of early modern humans never experienced significant snowfall.
This is complicated by ice ages, but people didn’t spend a lot of time on on near glaciers until very recently. Lack of food and warmth where huge issue before relatively advanced though still Stone Age technology.
Another way of thinking about this is to compare animal biomass per square mile in say Mongolia with Ghana.
70% plants is absolutely “practically vegetarian” compared to, say, a diet consistent with the pre-agricultural evolutionary environment of most Americans. Personally, in excess of 90% of my caloric intake comes from animals (and I am visibly and medically healthier than 95% of Americans, even health-focused herbivores, as are people I know who eat similarly).