Actually it would be unbelievably difficult but in light of the pandemic l would have thought that our leaders (politicians and medical officers alike) could spend a small portion of their daily media appearances to at least outline the health benefits of good health aka diet and exercise. ‘Hey, there is something the majority of you can do to reduce your likelihood of severe illness from Covid that also has a positive impact on essentially every other health measure too....’ pretty easy sales pitch.yes, curing the western obesity epidemic is simple and wouldn't take long either.
Even if a small percentage of people would hear the message and improve their health it’s be worth it