"And those benefits to dieting are very much "potential". Study after study has shown that diets don't work in the long term; people usually gain the weight back."

I'm sorry, but this is misleading BS. Studies have found that diets don't work for most people cause most people just suck at sticking to diets, not because CICO is somehow fundamentally flawed. To imply the second is dishonest.

It would be like saying that suggesting people to work out to get in shape is useless cause studies have found that most people don't stick to exercise plans.

"Leave fat people the fuck alone about their diets."

Unfortunately we can't. Cause obesity is a real public health crisis and diets is why. That's not to say that we should encourage fat shaming. But we need to be honest and not coddle people