The short answer to why certain cancer preventives and/or treatments do not recieve recognition from the medical establishment is money. The medical establishment is a business, and the money does not come in as good when everyone is well. The sad truth is that if everyone became healthy then the medical establishment would be ran out of business.
The following video shows people how to remove the edible seed from the 'pit'(the stone like thing in the middle of the apricot)