"It doesn't matter because there is a huge colony of bacteria and fungi living in your soil, and you feed them, not your plant directly."

I take a minor issue with this. Even the worst fertilizers have plant-ready nitrates available, and the bacteria have nothing to do with those since it's already-processed into a form plants can use but bacteria cannot use. Almost every other nutrient is water-soluble, so that again isn't an issue.

The only reason you should ever have a microculture in hydro is if you are using a high urea or ammonia-based nitrate source, and if you are trying to harden plants against disease.

Also, speaking as R&D director, let me say organic is purely marketing. I've done it all from SEA-90 to Fox Farms Organic, and I've never noticed a difference in yield hydro-wise, from cannabis to tomatoes to mints to lettuces.