The thing is basically that fatties eat sugar, and sugar is the leading cause of basically all these issues. It's addictive as fuck (or more) and its metabolic properties are unique (see fructolysis), and it has a bigger lobby than the tobacco industry ever had. This lobby manufactures false news about any sugar alternatives and tries to shift blame for everything sugar causes to anything else from eating fats and oils (actually healthy) to meat (healthy and is the only food that contains everything a human needs), as well as the old bullshit distraction about cholesterol and such.