To your comment about how automatically unhealthy fatness must be because of "health risks," can I ask you what other characteristics count as health risks? If you don't know, here's a few:
Age, sex, ethnicity, socioeconomic status, geographic location, genetics, oppression, childhood trauma, adult trauma, medications, access to healthcare, ability, family dynamics, and so much more.
So if that's the case, then why is weight the only "health risk" people talk about? Well, because people believe weight is a simple choice and easy to change. Not only is there no "healthy way" to lose weight, as you mentioned, there is no scientifically-proven, sustainable way at all. Weight is also extremely determined by genetics (I'm talking a whole 70% of variance, a percentage comparable to height) and, wow, it's also determined by a bunch of the characteristics I listed earlier too. And that list of characteristics, well, I'm not sure most if any of those traits are a "choice" either, especially about what you're born into.
So if weight is just as unchangeable and just as much of a "risk" as other traits, maybe it's time to stop feeling the need to yammer on about it on a post that talks about the horrific and deadly mutilation that fat people are subjected to because of rhetoric like yours?
Even if weight was the only health risk in the entire world, what does that have to do with this post? You even mention how a lot of the reason why it's a "health risk" is because of the deadly oppression that fat people are forced to endure—oppression that affects other characteristics on that list too, such as how fat people endure a wage gap and rampant poverty, little access to healthcare, tons of abuse in both childhood and adulthood, and more. This whole list of characteristics, including weight, isn't even what directly affects health. Socioeconomic status isn't a health risk because you get a cold depending on the number on your bank account. It's a health risk because poverty means less access to protection against the elements with clothing and shelter, less food and less variety of food, difficulty obtaining healthcare, and so many other factors.
There's also the fact that not a single health condition has ever been proven to be caused by fatness. Correlation and causation are two separate concepts, and any researcher will tell you that conflating the two is a major validity error. Most weight science is riddled with validity errors, bad methodology, bigotry, and logical fallacies. Then there's how not a single health condition is solely obtained by fat people either. Not. A. Single. One.
I believe you felt your addition was you being helpful, but hammering the fatphobic rhetoric of "Weight = Health!!!!!!!!!" like I have to hear from fatphobes constantly as a mod for this blog is not actually helpful. Whether or not weight is a "health risk," whether or not a fat individual is unhealthy, none of that matters. Health does not determine a person's humanity and worth, and an individual person's health is their own business. Being fat does not make my medical history subject to peer review.
This is a post I wrote a while ago that addresses this same topic of health risks and fatphobia.