Reply To: Are these kinds of products going to allow me to “texture” paint, not sculpt?

You certainly can Texture Paint with them.

But…you will probably need very high resolution Images to get the details of those ‘Alphas’. Performance in Blender might be subpar. Texture Painting in Blender is unfortunately not very good (yet). Painting with large Size Brushes or on hi-res Images might be extremely laggy.