If you're gut loading your insects and dusting them with calcium 6x a week, vitamins 1x a week, then your beardies will be getting what they need.
As far as I know, they won't starve themselves to death. So if you offer greens every day, insects every other day, they may eventually take to it. Mine rarely eats greens on his own, but if they're crawling with insects he will take some in as he's scarfing down his protein.
Here is a picture of my set up for light placement:
Sent from my iPhone using Tapatalk