Yes, that's it exactly. And all of this, which today's Catholics pretend has been the teaching from time immemorial, is all derived from an allergy to the Bible the Catholics picked up from the Protestant reformation. How great must be the hatred that caused such a change in perspective.
Perhaps a better question to put to the author would have been "Did a Literal Garden of Eden, and a Literal Tree Of Life, Really Exist"?
Alex . . . you and I both know what their answer to those questions would be.