that's not the point , beardies need a varied diet to truly thrive , greens are a must as well not one or the other.
Above someone said crix should be used as a staple as opposed to mealworms and I don't see why mealworms can't be used as a relative staple as long as the worms are gutloaded for a couple of days. Also young beardies should not have a lot if any greens in their diet as mentioned above. These guys grow fast and young ones should be fed almost exclusively on small insects whatever they may be.