Before the second half of the last century in the usa, licensed doctors, as well as anyone else, was allowed legally to cure cancer with proven methods. Then the 'legal'/'lobbyists' for the sickness industry got laws passed , federal laws, that made it illegal to use the proven, non-toxic, inexpensive methods that had worked for thousands if not millions of people already. That's one reason thousands of people daily started flocking to other countries for the proven treatments not allowed in the usa.
To find them, look outside the box. Look for them, and see how they worked, naturally, and frequently.