I suggest that we are not “using” plants and instead that we are working WITH plants. And indeed, it is true because in biological timescale they are actually our ancient ancestors. Plants were here working on this “living” project for at least several billion years before us, and even hundreds of millions of years before the dinosaurs.
We are more like “renters” from …the plants; they are the only way we can get minerals because mammals cant digest rocks. Plants can, they are in symbiotic relationship with the bacteria, mycelium, and other microorganisms in the ground slow leeching the rocks into bioavailable constituents, then humans eat their bodies and get minerals: calcium, phosphorus, magnesium, etc. The plant is the medium for humans to live.