Art is taking a number of given things and represent these in an original and innovative way. The element of adding unprecedented creativity is important to define art. In a sense, this can be applied to Poser. It is not art because of the tool but because of the result.

How far is purism going? Do true 3D makers reject all pre-made primites, like spheres and cubes too? Do they construct everything by themselves?

Do you think Michelangelo or other great painters, created their own paint? Or sculptors their own marble? or paint people using his own inspiration? They used models, living persons, that posed for them and this concludes the circle :-D