Geez I dislike it when people always have to disagree with these kinds of topics, but yes theres risk with sleeping with any animal. However, you don't have to be a downer for those that just want some cuddle time with their pets. Theres no harm in it, unless they know it can harm them(like being a bad sleeper) . Its fine if you yourself are anxious or nervous sleeping with your beardie, especially if you're a bad sleeper, but don't berate others for their choices. And most beardies don't wander in their sleep. Once they get comfy, they get really grouchy about having to move.
That being said, I do sleep with Jupiter from time to time. Its also part of the process of getting him used to me. I build a pillow fort around him for added measure and then we have sweet dreams~ I used to sleep with my previous beardie Charmaine, too. Now she sleeps eternally in lizard heaven~