You have no way whatsoever of knowing that a simple tumor removal or mastectomy would have saved your neice. Removal of breast tumors or entire breasts often fails to get all of the cancer or prevent its return. A lot of women who had tumors and breasts removed and allopathic treatment for breast cancer are buried every year,
Likewise, a recent study demonstrated that lymph node removal had no effects on survival rates in the instance of breast cancer - and I rather doubt that it would for other cancers as well:
Organs and other body parts which become cancerous do not have to be removed. In many instances they can be saved by eliminating the cancer.
Finally, you might note that in the alternatives I suggested I did NOT suggest that someone merely rely on laetrile. Laetrile is a good adjunct to use with other alternatives but I would never rely on it as a standalone treatment.