User blog comment:Genesjs/My views on the SFW/@comment-1272757-20100720063058

And sometimes people just feel like making Recolors allow better depiction of their charcters. Wolfe's main pic is a recolor, and just look at the Hyper Statyx image.

Either that, or sometimes people are just too lazy to actually draw their pictures; or feel their drawings aren't good enough to be shown.