if it worked like that my life would be so much easier... gardening in general would be so much easier. but the amount of nutes in your soil is directly proportional to the product. wether tobacco or wine or ganja. if we look at tobacco growers allowed to legally study how soil effects the burn quality, you'll see it's pretty drastic.. so not just in terms of plant health but the smoke and taste, ratios are very important
I sure wish I could just pump my soil with organic nutes though..
Have you grown in an organic soil using water only and no bottled nutrients? It doesn't sound like you know much about it at all from that statement.
Read this description of this companys living organic soil:
http://www.kisorganics.com/products/shop/165
"KIS Organic Soil Mix is a revolutionary water-only soil mix for all container and raised bed plants. Ingredients are 100% organic and natural (minerals). No need to worry about burning your plants either, just plant and water until harvest! Get rid of all your bottled nutrients, and forget about confusing and expensive trips to the hydro shop or garden center. This soil mix has all the beneficial biology, nutrients, and minerals your plant needs to be happy and healthy for up to 6 months. Comprised of Alaskan Peat Moss, Oly Mountain Fish Compost, and medium and large pumice, it will allow for adequate drainage and aeration and just requires periodic watering (no nutrients needed)."
You can grow a plant in this soil from seedling to harvest with just water. How would that be possible if the nutrients are just directly available as you say. Obviously the plants nutrient requirements change over time.