So I find this unsurprising because it was what I was always taught growing up.
After a bit of digging it appears that this study is important because:
1. It's direct evidence of mammoth consumption vs the existing evidence of arrow heads and other tools being found alongside of mammoth remains.
2. There's apparently been a growing movement to paint Clovis culture as primarily relying on plants and smaller animals in spite of the existing evidence so this confirms the traditional view.
Yes, it is very abundantly clear that those who prefer the meat high in protein and fat could take over any population which had more of a vegetarian diet.
The most glaring example of this is the Muslim conquest of India which happened primarily because the Muslims had a diet rich in meat and the vegetarian Hindu Indians lacked the necessary protein and fat and so were defeated.
After a bit of digging it appears that this study is important because:
1. It's direct evidence of mammoth consumption vs the existing evidence of arrow heads and other tools being found alongside of mammoth remains.
2. There's apparently been a growing movement to paint Clovis culture as primarily relying on plants and smaller animals in spite of the existing evidence so this confirms the traditional view.