As a scientist, I can assure you that there is no conspiracy around not curing cancer.
Probably no conspiracy...but we must be careful and try to be informed patients because there are unethical and/or incompetent doctors and dentists pushing expensive procedures and medicines that are not needed and/or don't work. Of course I assume the vast majority of doctors and dentists are ethical competent professionals...No surprise there are bad apples in every profession.
On the more
important issue RC51 I hope your wife responds well to therapy and makes a full recovery.