I like yoga a lot, and it might well have a lot to offer here - but I would hardly advise anyone to forget about good diet, nutrition, lifestyle, cleansing, etc. After all, those are ESSENTIAL for a healthy body.
For all the benefits one might get from yoga, there is no disorder known as yoga deficiency. A body that practices yoga without other good health is still gonna be one sick body. Maybe a flexible sick body, at least for awhile, but a sick one nevertheless.
I am not sure that we are really in disagreement, as I think you were probably just dramatizing your point.