I only used them when I was trying a perlite Hempy grow.
I guess the purists would say organics is all of the elements needed for the grow are already in the pot and the microbes break it down and feed it to the plant. My pots are way too small to sustain a grow thru the end so I have to revert to other methods to supply the elements needed along the way. I do that with top dressings of worm castings, malted barley, neem, karanja and crustacean meals and a few of my Jadam extracts.
I'm not a purist by the true definition I guess. But I don't really care about that. I just want to grow healthy, happy plants in the most natural way I can, since it is medicine for me and the less chemical inputs, the better.