I've read people think that too about flushing. Yeah there's the argument that it might not be needed, But from my point of view. What if you are smoking nutrients? That can't be good for you. You feed a plant it's whole life and I know for a fact I've smoked other people's buds that had that chemical taste and harsh on the lungs. For that reason I believe in flushing, and that it is not going to hurt anything at all, when your flushing in soil especially it needs to get done. Soil holds nutrients and stores it why it's recommended to do a 2 week flush in soil. As your flushing soil your plants are still using up the nutrients that are left in the soil for most of the flush. Basically what your doing is slowly leaching them excess nutes out that she doesn't need anymore. There's 2 sides of the fence. I choose to flush cuz I want the best tasting weed and cleanest on my lungs and body and health.