It is said that the mind of a genius goes to places other minds cannot go. Well isn't that also true of creative people?
You need not be a genius to create fanciful worlds and imaginative lands. You need not suffer for it. You need not be tortured because of it.
The creative mind looks OUTWARD into other realms and shares those visions with those of us who can only admire the art.
Perhaps there is always a bit of genius in a Tolkien. I would not now. I cannot say.