Foraging, trapping and fishing will keep you alive but you sure wouldn't be living.
I will keep that in mind the next time I trade with people who do it.
Currently there are neighbors of mine who hunt, forage, trap and fish for their subsistence.
... We graduated from hunter gatherers about 12,000 years ago. Even native Americans used agriculture.
Hold on, in my region of North America the Indigenous Peoples did not use Agriculture. The technology had not traveled this far East, before Europeans arrival. It had only reached the Pequots / Mohegans within the very same generation as when the Plimoth Plantation colonialists arrived.
The line between the Pequots / Mohegans and the Nipmucks serves as the boundary of where that technology ended. The Nipmucks did not get it.
I live on land that was part of the Abenaki lands. The Abenaki, Abenaki, Algonkin, Massachuset, Mattabesic, Micmac, Nauset, Nipmuc, Pennacook, Pocumtuk, and Wampanoag did not use Agriculture.
Areas prone to drought, have a much harder time surviving. People in those areas have a much stronger need to find other ways to survive.
Areas that have never been exposed to drought, are very much different.
I chose to homestead in an area that is not drought-prone, for this very reason.
... Off grid doesn't necessarily mean living like a bushman
You are the only person to bring the idea of 'bushman' into this conversation
Here in my township there are already multiple families who are off-grid.
I plan to be off-grid before this season is over.
... Self sufficiency is a myth.
There are myths, sadly you may be living in one.
... We all need outside help in one form or another. Instead of trying to rough it alone, better to work on a small, tight knit community that is sustainable.
You are really jumping around a lot in this.
Okay, nobody said anything about lone-wolf survival.
'Tight-knit' community is certainly over-stating it. But community is needed.
I am an organic farmer. I do bring in a small pension [less than minimum-wage] which helps me to build my new farm. I am able to produce more than what we need for food, I market the surplus. [however only about 80% of our diet is currently produced on our property] I allow a couple neighbors to forage, etc on my land.
There is a big learning curve, I am learning more and more each year about the edibles that grow wild here.
Fortunately this is a region where a family does not need very much cash to thrive.