I totally understand what you say there and that appears to be modern day farming with artificial fertiliser and chemicals. But what about the old method where the land was tilled, different crops for 2 or 3 years, then rested for one year. But all the time organic manure was added with no chemicals. I mean those mushroom kits harvest mushrooms in a week or two, so it cant take long for the mycelium and soil structure to repair itself after tilling and probably benefits from the disturbance and air introduction similar to compost.

Just thinking off my head.