Apparently, the Amercian Cancer Society does not agree with your suggestion.
“Available scientific evidence does not support claims that Gerson therapy is effective in treating cancer, and the principles behind it are not widely accepted by the scientific and medical communities. It is not approved for use in the United States. Gerson therapy can be dangerous. Coffee enemas have been associated with serious infections, dehydration, constipation, colitis (inflammation of the colon), electrolyte imbalances, and even death.”
As a former cancer patient, I can most definitely say that yes, I have read the inserts on all my medications. And I was OK with it, because the alternative was much worse.
And, knowing some things about how those patient and physician inserts are developed, I'd rather have scientific data about potential risks beforehand.
Alternative medicines and therapies don't typically collect or report their risks, and even worse, they give false hope for patients.