This is the unfortunate reality of how bad it's gotten. There are so damn many of them that even if we could force them to do something like this, we just don't have the resources to handle it. So basically we're left trying to convince a metric shitload of fatties to have some self-control and we see how well that works. The only feasible thing we could do is simply refuse them medical treatment at all so they die like they should, but that would require a lot of changes to laws about healthcare that obviously won't happen.