Obese people should not be shamed or discriminated against. However, I agree that the positivity trend is not helping like the intention probably was. Obesity is a leading cause of death in most western countries, and people should treat it as that. We would never make campaigns for cancer or heart disease, that people should accept having it...
That's a great point you just did, I like it a lot, people shouldn't promote things that kill as being amazing, but they some still do. I must say that the whole fat positivity has gone off the rails and it's sad but funny at the same time.