Eating bone marrow played a key role in the evolution of the human hand
https://www.sciencedaily.com/releases/2018/07/180711105725.h...
Prehistoric humans ate bone marrow like canned soup 400,000 years ago
https://www.sciencedaily.com/releases/2019/10/191009142902.h...
This conclusion is a big leap, even as per the article you shared. "The strength required to access the high calorie content of bone marrow may have played a key role in the evolution of the human hand and explain why primates hands are not like ours, research has found."
It's just a possibility. They can't even make a strong claim about it.