There is much more. Meeting one's subconscious, manifesting problems to deal with them, and meditating on 'a higher level' I see as being practical. Besides, how about the practical stress relief taking revenge upon your boss?

There is possibly as much unknown inbetween our ears as there is inbetween the outer stars of the universe and beyond. That unknown in my head is begging to be explored.

I first took up LDs to thwart nightmares, and now I can do so much more! It is far from just being entertainment.