I said I wasn't going to come back and I'm getting exhausted now, but OK. It’s only fair to answer your points Kennehora before I check out.
I do know that wasn't your actual question about the very thin woman in the photo, but I can't actually answer that question since I don't believe the photo of Corissa (if we're still using her as an example) is meant to be 'aspirational, attractive and desirable'. I just see a fat woman being allowed to pose for a fun photo and feel OK about herself, accompanying an article talking about the best ways to encourage and support weight-loss. You don't agree though, and that's fine. I'm not asking you to agree with me on that, I'm just explaining that it's why I can't answer your question in a way that would probably satisfy you that I'd answered it properly, because it you're starting from a point that I don't agree with. I hope that makes sense.
I don't think a photo of a very thin woman is inherently aspirational either, but in certain contexts (as OnlineAlienator says) that photo would of course be very problematic. Similarly, if Corissa's photo accompanied an article saying 'being obese is great and not at all bad for your health YAY!' then I'd agree with you, but that's not the message I take from the photo in this specific context. I do think it's very complicated and there's a fine line between representation and aspiration.
I do find it quite interesting that when I posted the link to that article, you immediated zero-ed in on the photo of Corissa and rushed to critique it. There's something about images of fat people that seems to spark a certain reaction in ways that I've never seen happen with anything else. I don't get it. But I also don't get the appeal of the 'fatlogic' subreddit either, so I think we're just on very different wavelengths.
I actually do agree with you, Kennehora, about the way that we visualise 'obesity' as an extreme thing, and assume that it doesn't apply to people of a 'normal' size. I could post a picture of myself now and some people would probably say 'you're not overweight!' because I don't look huge, but the point is I am overweight (by about 1.5 stone) and I know I'll feel better when I shift it. You can't decide that someone's weight isn't a problem just because you think they look OK. I think part of the problem is that people see 'obese' as such a loaded, judgmental word that they can't believe it doesn't apply to them. My partner's BMI right now makes him obese (again, he's working on it) but I would never want to describe him as such because it just sounds so horrible. I know you didn't like the article I posted, but that was touched on in there too - about how even when people are obese, they use very negative, othering language to talk about 'obese people' in general.
Please forgive me if I don't come back to this thread but I really don't have anything else to say. I feel like if I met any of you in person we'd probably get on great, and arguing on the internet is not something I typically like to do. So thank you and that's going to be it from me (for real this time!)