Body Pos..err wait?

Photo's like this piss me off :

Because it's not about body positivity at all! And it fucking could be! Look, it doesn't need to be about who is more attractive. All the girls are attractive! Also, why are woman constantly boxed into that one single aspect that seems to define them-their looks. So while this photo may seem to be promoting a love for thicker woman ( trust me i'm a fan also) it also demeans the skinny girls. You don't need to shit on something in order to make something else look good. If it's good-then it stands out as good. This juxtaposition pisses me off. And what bugs me a little more is that its trying to do good..while simultaneously doing wrong.