All good points, Alkia. And in much of Australia that was certainly the case. The Perramangk in my area used firestick farming and related techniques to manage the land as a treed savannah landscape that made the most of both plant and animal foods, and I try to integrate both European and native food plants into my garden. I also teach the methods, as well as showing people how to forage responsibly and to prepare what they find. Food security is a bigger deal than most people think. Our town also puts a lot of effort into cleaning up the river. We live in the driest state on the driest inhabited continent, and water is important.
If you want to see a glorious example of the method in action, look up The Food Forest at Hillier, South Australia, run by Graham and AnneMarie Brookman. They live not far from here and are really interesting people.