Photographers try to build their brands by developing a style that's somewhat unique to them. I'm not saying that every photographer uses techniques that no one else does, but they do tend to be somewhat consistent with what they're doing in post-processing.
A very large percentage of physique models *want* their images edited before they're published. There are many who'll get upset if their photos aren't Photoshopped before being shown to the public.
I tend prefer minimalist (near-zero) editing myself, but the China doll imagery is very popular among models and fans alike, so I don't think we'll see him abandoning that style anytime soon. I think it works very well for Robby.