"In other words, the individual incidence of cancer deaths has actually fallen."
Situation: person has an almost undetectable cancer. They see a doctor, no cancer detected, later that week they are shot by police at a routine road stop.
We get in our time machine, go back a week and a bit, and supply the doctor with a better detection kit.
Situation 2: person has an almost undetectable cancer. They see a doctor who refers them to a specialist, cancer detected, another notch on the cancer tally board. Later that week they are shot by police at a routine road stop.
Nothing has changed except in the second case there’s another cancer detected. The person is still dead from non-cancer causes, just in one scenario they died as a haver-of-cancer and in the other they didn’t.
Better/earlier detection will necessarily lead to a decrease in cancers that are never detected (which I interpret as an increase in cancers detected before mortality from other causes), otherwise it’s not better/earlier detection.
My money is on diet and pesticides/preservatives/etc. being another big one. With this, too, there is little official evidence that, say, Roundup, causes cancer, but there is, imo, a stronger lobby against a positive outcome in those studies, and they don't necessarily control for interactions such as Roundup combined with the surfactant that it is typically mixed with that increases cell penetration.
In sum, I’d rank the risk of Roundup being carcinogenic on roughly the same level as that of 5G: possible but unlikely, given the best available evidence.
For the record, the other reasons are to do with the larger ecological impact of roundup-based practices, such as harm to soil fungi and bacteria, and collateral damage from runoff or wind. Plus, there were some studies finding it may cause harm to intestinal lining and such, even if it's not actually a carcinogen.
We live in an increasingly sleepless society and lack of sleep is effectively a carcinogen.
The present meta-analysis suggested that neither short nor long sleep duration was significantly associated with risk of cancer, although long sleep duration increased risk of with colorectal cancer.
^Matthew Walker, presumably the 70% drop is from work at his Berkeley lab
Pollution is lower too (again, in the US): cars used to pollute a LOT more. Smog used to be far, far worse in the LA area decades ago, so even with more people and more cars, pollution is lower, particularly localized pollution that affects people more. Of course, global warming pollution is certainly higher, but that isn't localized and shouldn't have any effect on you (it's just CO2).
Obesity is significantly worse, however.