By the same token, chemotherapy drugs themselves are often class 1 carcinogens.

As to why, chemo, radiation and surgery are where the money is and they are just about all that is taught in mainstream medicine for curing cancer.  Doctors don't know beans about the role of diet and nutrition or natural alternatives.  They aren't taught about them and besides, there is no profit in telling someone to avoid and get rid of toxins and radiation (including cell tower and cell phone radiation), have a healthy diet and lifestyle, get plenty of vital nutrients, use natural cancer fighters and immune boosters, manage stress, etc.

If Gordon Gekko had not been in Walstreet he would have fit in perfectly in mainstream medicine.