Okay, so you enjoy his work and think he deserves it, but you yourself would not provide for him. Then who should ?

It doesn't. It's based on a symbiotic or competitive relationship (more symbiotic in the case of the tree, and mostly competitive in the case of animals). And in the end, scarcity of resources always gets you. If there was an infinite amount of energy, an infinite amount of natural resources, all would be cool. That is also the premise for the venusproject you mention. Sadly, that is not the case (does not justify people doing stupid things, but does represent a slight hurdle), plus, the resource driven story completely foregoes the scarcity of *human* provided resources (expertise and knowledge).