[lock-the-spock]

None of the groups you mention live (near-)exclusively on meat and that erectus hunted is well known. But hunted does not mean their diet was mainly meat-based. There is plenty of evidence from the teeth usage that our ancestors lived largely/mainly from consuming plants.

[jononomo]

Okay, so apparently there is something going around in the vegan community about how humans evolved on plants. From what I can tell this is completely unsubstantiated. I don't deny that ancient humans ate some plant-based calories, probably fruit and berries, maybe a few tea leaves, but the vast, vast, VAST majority of their calories came from hunting -- remember that we're talking about the era before agriculture.

[Mildlypolite]

"The Hadza people eat no processed foods, are rarely exposed to antibiotics, and live seasonally, eating more meat in the dry season and a predominantly plant-based, high-fibre diet in the wet season. " "The staples of their diet include the baobab tree, high-fibre tuber roots, berries, fresh honey, and various meats from hunting. A common dish is a soup made from the baobab fruit, something renowned microbiologist Tim Spector sampled while living with them. Just one helping of this creamy mixture contains more fibre than the average Westerner gets in a day!" https://atlasbiomed.com/blog/the-hadza-people-what-can-a-hun...