Hi Maitri
I Think that is because at the current moment there is no real known cure for Cancer. It is a disease that goes into remission. It is also dangerous to claim that you can cure it, therefore giving people false hope.
People have in the past fallen for "Quack" medicine men and rejected conventional therapies and shortening thier life in the process,when had they carried on with the convention treatment that would perhaps have had another 10 to 15 years on this planet.
It would be interesting to see Independant documented proof to back up the claim of curing cancer. perhaps he has something.
Namaste
Rob
Friendship with oneself is all-important, because without it one cannot be friends with anyone else in the world.
Eleanor Roosevelt