1. Lots of people are talking about mandates.
2. I didn't say anything about ICUs, or about obesity spreading to other people. Across the entire healthcare system, there could be much alleviation of burden if people took dietary and activity-based steps toward being healthier.
3. Banning smoking in public places doesn't stop smoking altogether. If the government wanted to end smoking, they could "mandate" the complete shutdown of tobacco companies. Or the tobacco companies themselves could shut down of their own accord. But folks involved care more about their business than about the health of their "customers". Healthier food in school cafeterias is great, but clearly not enough. People are being hammered with anti-COVID material left and right; nothing even close to that is being done toward pressuring people into taking better care of themselves through diet and exercise.