When people refer to natural or alternative medicine, they're not usually talking about common sense lifestyle changes universally endorsed by the medical establishment. That's just regular medicine.
You'd think so, but no. My father had amazing cancer care but the idea of prescribing him yoga or actually any kind of light physical fitness program was considered "integrative" medicine and basically outside of the mainstream. This is changing. But "regular medicine" is, at present, very much not a holistic healing practice.