In fact I guarantee you don't have the statistics you're trying to claim here, that health problems more often than not are causative by the obesity than correlative, the cause being ither systemic health problems such as hormones, metabolic issues, mental healthcare issues, or other disability. The metabolic hormone disorder I mentioned is but one of many that cause obesity, and it's one that impacts as much as 10% of women. A *significant* number of people.
As I recall, my first post on this topic made an exception for those people with health issues outside of obesity that could exacerbate obesity.
Let me take a stab at categorizing here:
1 - People who are obese, but fit, and might not be adversely affected by being overweight. (I'm dubious that this category exists, but for this discussion, I'll grant it to you.)
2 - People who are obese because of other health issues.
3 - People who are obese because they consistently consume more calories than they burn.
I'm mostly concerned with category 3. Within this category I would say there are broadly two sub-categories:
3a - Poor people who live in "food deserts"
3b - Financially secure people who choose to eat unhealthily.
I just did a quick internet search on the question "is obesity unhealthy". As you can imagine, I got a zillion hits. Some obvious themes came up:
"obesity increases the risk of diabetes, heart disease, and some cancers"
And that's just a 30 second bit of research.
===
Now I understand that mental health and body image are real issues, I'm not ignoring those. And I would agree that it's crucial to find ways to be kind and compassionate when addressing these issues.
But again, you've got a real uphill battle on your hands if you want to prove your claim that being overweight isn't - statistically - unhealthy.