That walk is on the opposite side of the country from me and takes weeks to do. Caminito del Rey is less than 90 minutes from us and can be done in a few hours by anyone with the stamina to walk about 10 kilometers. The only thing in common between the 2 is that you mentioned it as a dream hike while Caminito del Rey was my dream hike when I was living in America.
I guess I should add that not being afraid of heights is also useful :-)
That would be a problem for me, too treacherous. That is so great you got to realize that dream. The Camino Santiago would be more of a spiritual journey, just too old to do it.