It's hard to do no-till indoor organic without doing that, so the cycling of nutrients needs to be continuous. Flowering plants need less nitrogen than in veg, but nitrogen is priceless and you don't want anything unused escaping up your exhaust vent in the air. Damn you N for being so volatile! So a cover crop indoors will sequester that unused nitrogen, and make it available later when your next cycle is in fast vegging mode and wants it the most.
So yeah, that's right for us no-till growers who are allowing our plants to get whatever amount of nutrients they want at whatever time they want it. Happy healthy plants produce more dankness IMO.