Why are we assuming that the top of a hierarchy must dress better and eat better than everyone else? They could just be leaders who command everyone, but still an assumption of equality when it comes to good.
Also hierarchy doesn't mean that there is a single individual that's at the top. There could be a series of caste hierarchies, where groups of people were considered "better" than others.
We don't know if everyone from the tribe was in the common grave or a select group of people.
You're building a narrative based on your knowledge of other civilizations histories and understanding of modern day social structures, and assuming those traits must apply to this civilization. The truth is, we don't, and likely won't ever, know how their social hierarchy was built. Anything said is speculation. This isn't the case where you can be 80% confident something is true, more like 2% confident based on the discovered evidence.
Also hierarchy doesn't mean that there is a single individual that's at the top. There could be a series of caste hierarchies, where groups of people were considered "better" than others.
We don't know if everyone from the tribe was in the common grave or a select group of people.
You're building a narrative based on your knowledge of other civilizations histories and understanding of modern day social structures, and assuming those traits must apply to this civilization. The truth is, we don't, and likely won't ever, know how their social hierarchy was built. Anything said is speculation. This isn't the case where you can be 80% confident something is true, more like 2% confident based on the discovered evidence.