If they really did, it would never see the light of day.
There’s too many trillions of dollars at stake with that disease: diagnosis and treatment centers, R&D, surgeons, medicines, chemo & radiation centers, fund raising, personnel, etc etc etc.
It’s a medical “cottage industry”that will endure. Sadly.
Just remember the car which got 90-100 mpg on a gallon water? Plenty of data and witnesses. The car companies weren’t going to let that happen. The “wet work” teams went to work.
Sadly you have nailed it. Western medicine has zero motivation to cure cancer.