You're projecting a lot of things onto what I'm saying. I never claimed hunter-gatherer was for everyone. Getting back to nature is. That's science.
Privilege is there to be shared. This includes privileged wisdom.
Indigenous cultures are dying out due to settlers and colonizers decimating their lands, cultures, and people. This is not news. It has nothing to do with their way of life, aside from not having developed appropriate weapons and immune systems from those who would seek to kill/displace them.
As for the global food problem, I personally hypothesize capitalism needs to fall or radically transform before that can be addressed.
Learning to peacefully and freely share food seems like the simplest way to address current food issues, but people's desire for money seems to get in the way.