I've seen the bone marrow hypothesis also, which is very interesting. Afaik. evidence shows at least that there was enough specialization during neolithic era to have bone marrow cooks where the hunters delivered their bones. Something you wouldn't expect based on just school knowledge (at least back in 90s/2000s).

I see your point about agriculture at first degrading quality of food. Are you aware of evidence of brain size degrading even? Is it visible in the temple bones?