The idea is specifically to allow the farming of organics in a structured way, and potentially the eventual creation of farming equipment and tools. The idea stems from the generator, which eats organic nuggets to produce power, and the fact that organic nuggets must come from plants around the world. This gives rise to the idea that farming organics would add a level of depth, realism, and usefulness to the game.
I still believe that organics should spawn naturally in the world, as they do now. However, there is not a whole lot of "structured" gameplay in Astroneer. This could help to attract new and different audiences or "seal the deal" for those on the fence about getting the game. And besides, sometimes you just don't want to have to go on a long journey just to get some organic nuggets.