Optimizing for those extra 2 months is not a goal we should be striving for.
The problem is as patient's we've never gone through the experience before and are totally unprepared for what it's going to be. From the beginning all we know is that path A ends too soon, and path B has a chance of having a good outcome. We hope beyond what's rational that path B will have an exceptional outcome for us and go down that path. Only later do we realize how painful and miserable the experience can be for everyone.
This is an assertion that you're stating as fact, but it's directly contradicted by both the aforementioned study (it's not true that "fewer people reach that cohort") and by existing domain knowledge about how cancer screening actually works.
As explained below, screening people for cancers earlier actually doesn't improve mortality rates significantly. In fact, survival rates are actually roughly flat when adjusted for detection time, because earlier detection mostly catches cancers that wouldn't actually progress to be fatal in the first place.
> Additionally those screenings will be lower cost than the US model
You have this backwards. Screenings for early asymptomatic cancer are actually the textbook example of gratuitous costs.
But I’m quite confident that we have enough data to establish guidelines on what circumstances to screen. And health insurance coverage shouldn’t be a factor whether to screen or not.
Here are the cancer screening guidelines - https://www.uspreventiveservicestaskforce.org/uspstf/topic_s... - You can see that many of these carry the D recommendation, meaning they should not be done because the harm outweighs the benefit of the screening. Screening only makes sense if the cost of the test is low, the test is very accurate, and the benefit of the treatment you're going to undertake after a positive screen is large.
(1) https://seer.cancer.gov/registries/ (2) https://en.wikipedia.org/wiki/David_Weedon (3) https://www.amazon.com/dp/0702075825/
Regardless, in Australia fewer will reach that cohort because preventive measures through universal health care are in place. That means widely available cancer screenings will catch malignant tissues before they turn cancerous.
Additionally those screenings will be lower cost than the US model and the patients will have a better quality of life.