You’re right … there are many forms of cancer that might be more harder to ‘cure’ or manage. Age also plays a role and it is generally agreed that as we age, the body inevitably just breaks down and eventually will start developing cancers no matter what we do in very advanced age. But the majority of all cancers we now live with are mostly all preventable and many of the ones that aren’t preventable could be treated. In a utopian world, we would manage all the food intake, environmental factors and genetics that all contribute to cancers in most people.