From a 'public health' perspective, it makes perfect sense to limit the frequency of screening procedures by age and other broad risk-factors, but that doesn't help at the individual level if you fall on the unlucky side of those statistics.

Most cancers are still very much lethal once they progress to a certain point, and the best treatment we know of is early detection. Many of the cancer screens are harmless or don't add significant risk of death, so it really comes down to money and medical resource availability (also solved with money.)

I don't see much difference in someone paying out-of-pocket for a full-body MRI/colonoscopy vs. them spending way above average on any other item that slightly reduces the risk of dying (how many smoke alarms and fire extinguishers does your home have?)