I doubt it will ever be a mainstream therapy, but it will have specific uses. With some modifications, you can even use it to help kids who suffer awful nightmares (as I did when I was a child), although of course, children's dreams can range in complexity depending on their age. Very young children don't dream in a visual sense, you can't really recreate that in a VR environment. Anyway, I'm so sorry, listen to me rambling on and hijacking your thread, sorry!
You're right there too, life can definitely be like pulling teeth and I think it's worse when it's without a purpose as you're kind of deprived of that motivation to pull you through difficult patches. When you're struggling, there's nothing tangible to latch onto and think "I'm going to fight and keep going because of blah blah". It's a bit of an emotional short circuit I suppose. Hopefully, something positive emerges for you later today though, even if it's just something small that makes your life a bit more tolerable right now.