What people get wrong is that you don't just trip balls and get cured. Re-integration therapy is vital for lasting effects. Grabbing some shrooms and digging in is recreation, which is perfectly fine, but don't fool yourself or anyone else by suggesting it's for treatment.
Yes. For example, IV Ketamine can yield not only immediate relief in a chemical sense, the treatment itself results in a fully-aware, balls-tripping, metaphor and symbolism-filled, time and space-warping experience in an entirely fictional space. With thoughtful guidance prior-to and after each experience, a series of them can, for example repeat a message until you "get it," or each may deliver a component of a profoundly larger message when they are combined, weeks later. What you do with it all will determine what you get from it.
I think there's simply so much value in being able to see the same thing in so many different perspectives that you never have considered possible at all in your life before.