I don't know that it's fair to dismiss it as completely bunk.
I do. It's bunk.
The observation of wolf packs with a rigid linear hierarchy with a large dominant male "alpha" at the apex keeping lower ranked males in line and a breeding female keeping the lower ranked females in line was based on social dynamics in wolves in captivity.
Even then, it was mostly drawn for two fairly extreme examples (including one where there were 10 wolves of nearly the same age, from multiple different families, within a 33 x 66 foot enclosure). It's more akin to the social dynamics you'd get in a prison than anything you find in nature.
In the wild, wolf packs are formed from family group(s). Usually one, sometimes up to three. The parents are the dominate members - primarily just because they're parents - and take the lead in the division of labour (hunting/foraging/scouting and pup care and defense). Dominance fighting is rare to non-existent.
When raised in captivity, family pack groups exhibit relationship dynamics that are more similar to wild groups than to artificially constructed "packs" of breeding age males and females.
The oldest breeding pair are the dominants and age is most correlated with rank (although its not a strong correlation). Hierarchy is indicated through submission behaviours by younger wolves during greetings, rather than aggressive/dominance behaviour. Ranks within the hierarchy are not fixed (excluding the breeding pair).
Female-female relationships show more dominance and submission behaviours than either male-male or male-female relationships. The main area where the sort of "alpha" behaviour comes out is when food is presented. But even here it is a female over male dominance hierarchy.
It's just that we've evolved to the point where the normal laws of natural selection and species propagation don't have to the follow the same rules as they once did when we were still "in the wild"
Prior to much of the modern scientific and medical advancement...
If you weren't fit enough to acquire food, and didn't have enough aggression and strength to be able to physically defend it from someone else who was trying to take it from you and your tribe, it means that you didn't eat/survive.
Social species exist. You do realise this, don't you? And have existed for tens of millions of years.
There are many social species VOLUNTARILY give up resources (food/water) to ingroup members if they perceive an imbalance in allocation. Reciprocal altruism is a well observed in mammals and birds, both in lab settings and the wild.
There is good evidence that hominids have looked after individuals who couldn't fend for themselves as far back as 1.8 million years ago.
There's more recent evidence for Neanderthals caring for a nearly blind, deaf individual with an amputated arm:
An older adult male Neanderthal from the Late Pleistocene, who had suffered multiple injuries, became deaf and must have relied on social support from his relatives and friends to avoid prey, according to new research.
www.sci.news
However, things like status and dominance are real in humans, just not as binary as they are in other mammalian species. People absolutely track those things, and and those things do correlate with mating and reproductive outcomes as well as other long term outcomes.
Humans are much more closely related to chimpanzees and bonobos.