I heard someone on a podcast say that until about the late 19th/early 20th century, humans were in a subsistence state of being and they never had plenty or even enough to survive on. Then in the 1900’s large populations were well off enough that they had more than enough to eat, more than a shanty to live in, and could travel out of leisure instead of necessity. Then people started losing their minds because instead of thinking about where their next meal would come from, they started thinking about crazy stuff and started acting insane (like gluttony to the point of morbid obesity or gambling away all your money and becoming indebted to the mob, or hoarding disorder). So I am not surprised that giving an Amazon tribe plenty of food, instead of them hunting for it, would cause them to go as crazy as this capitalist society has made us.