He's saying that there's no material implication. Fast food doesn't make you fat, and it's no silver bullet to health. The typical fast food reliant diet (more calories than you need) makes you fat.
Ceteris paribus, skinny tends to be healthier than fat, with longer life and better quality of life. One study cited here even indicates skinny people don't even have to be that healthy otherwise to outlive fat people. It's a simple "assumption" that requires more debunking than you have given here.
Studies have also shown that obesity is well linked to disposable income. Is it any surprise that restaurants also expand as disposable income increases?
Ceteris paribus, skinny tends to be healthier than fat, with longer life and better quality of life. One study cited here even indicates skinny people don't even have to be that healthy otherwise to outlive fat people. It's a simple "assumption" that requires more debunking than you have given here.
Studies have also shown that obesity is well linked to disposable income. Is it any surprise that restaurants also expand as disposable income increases?