If you mean to say that we should take a libertarian approach and not try to use government for nudging society towards healthier eating and lifestyle standards

If you mean to say that we should take a libertarian approach and not try to use government for nudging society towards healthier eating and lifestyle standards, you might as well say that we should give up on the health of the US. Because I have 0 faith in purely individual or "grass-roots" societal change fixing our obesity crisis, given the path we're on.