Once again, you are correctly pointing out the relevant details underlying those associations making it clear that the associations are not the morbidity. The morbidity in this case would be the lethargic cell signaling in people who tend to have high visceral fat. A very specific kind of observation. I'm not saying that obesity is a sign of health, I'm saying that obesity is sign of some prolonged and durable condition the obese person possibly had. In the case of Sumo wrestler, its natural selection pushing a form that succeeds at a prestigious sport invented a few centuries ago. This body type has greater than 35% body fat, possibly the fattest people on average. A resting metabolic rate that's lower than average. If you look at the biometrics of a Sumo Wrestler, they are literally dying 1000 times from covid if our statistical models are even slightly correct. Plenty of adiposity for the ace2 receptor exploitation. But it doesn't happen, despite the predictions because it's fundamentally mislabelling a parameter inference with the existence of underlying chronic susceptibility. Once again, the problem is using statistic to infer causality when statistics are only giving us emergent phenomenon that can have very different underlying forces that shaped it.

My problem is that we are over medicalizing everything and not looking at the complexity. If obesity or age truly killed people, Japan would have highest fatalities and Sumo wrestlers the worst hit.

This is flatly wrong, so this should enable us to refine the associations against lazy statistical inferences because it penalizes the people who aren't at risk, unjustly, and misidentifies the underlying cause of the risk with a specificity that can enable action. Most Morbidly Obese people who are at risk are at risk likely because their biological functions are not stressed or have some kind of hormonal imbalance that is uncontrolled. If Morbid obese people are told that working out and playing instead of losing weight will increase their protection instantly, they wouldn't be feeling helpless and trapped waiting for a pill or vaccine. This reduces risk for them instantly as the viscera is where all the chronic signalling issues prevent immune system function. As you said, the fat doesn't help, but it's the lack of stress the body is trained to handle consistently which is the issue. Not the fat, which is coincidental.