No, tumors are not in most cases (999 of 1000) cancer.
Most people’s bodies have numerous tumors and cysts that are totally benign.
Like I said, the only difference between benign and malignant is the growth rate. If you are going to die of old age before a cancer becomes a problem it is benign. If you double or triple estimated life expectancies, a lot of 'benign' tumors suddenly become malignant : )
I know that you know this stuff and you may even be technically correct depending on the definitions. I would call it accurate, but not true. How is that for a compromise?