Board Thread:Spoilers!/@comment-25926288-20160713182420/@comment-25375217-20161002185712

To be fair, she was asleep and in the Netherworld, so the inside of Pandora's Box being terrible doesn't have a lot of effect on her. She had no interaction with it. It's also worth noting that the heroes also knew Belle was under a sleeping curse, and they have no way to wake her up. They nearly gave up on waking up Dorothy until Snow realized Red was in love with her. If True Love's Kiss isn't an option, sleeping curses become permanent. Emma also probably saw or heard part of the little scene with Moe, so they couldn't even take her to her dad. Given that they noticed that Rumple disappeared after the wishing scene, it's not ridiculous that they were trusting that Rumple would find a way to save her. He was already probably on the way to the Land of Untold Stories by the time they found a way to save Snow and everyone, so instead of wasting time getting a sleeping woman who they have no way to wake up probably farther away from the one person who might be able to wake her up, they decided to let Rumple handle it - worst case scenario was that Belle remains trapped in a sleeping curse, which is how she would have been if they had gotten involved anyway. It was a lose-lose scenario in their case, and while it would have been nice to see them discuss this and feel bad about it, there really was nothing they could do.