Not to automatically understand it: they have no idea how the cell biology works. Just that it pays them lots of money.
Low power ultrasound causes cancer cells to heat up by 16° C, and give off X-rays. High power ultrasound causes cancer cells to give us more X-rays, and boil. The cancer cell popping.
Clearing the disease from the body. They do not need to know why. Just that it clears all 200 types of cancer out there.