Glenn, I think some of your photographs are absolutely stunning and they take me to places I could never go.
My friend (a retired GP) also travels with his camera, and it never ceases to amaze me that he is able to find such grace, beauty and colour in the poverty stricken areas of India, Africa and other such places. He has built up a friendship with some Massai warriors and the photographs he took were, like yours, stunning in content, composition and colour, and stand in their own right, as you so rightly say, as photographs.
I do however believe that they, and yours, could also make stunning artwork, but sheer auto-paint would not do them justice.
I think this picture, and the ones I did of your photographs proves that point. Oh yes! they are nice enough but do nothing to enhance, improve, or bring out a different mood or aspect of your lovely photography.
I personally think such photography needs a much more sympathetic approach, and an in depth, hands on, artistic treatment, in order to be able to stand in it's own right alongside one of your photographs.
A poor photograph can make a stunning artwork if the composition is right, and far outstrip the original. However an excellent photograph needs a whole lot more care if it is to stand apart from the crowd and not be a poor imitation of the original.
If I may use the analogy of artificial flowers. They look like the poor relatives of the real thing unless they are big and brassy enough to say, look at me I'm artificial but I am beautiful, and then, if used in the right context, they can look terrific.
I think auto-paint (in any programme) will always be a dissapointment if it is the sole tool used to turn out digital artwork.