system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: If MRIs can detect Cancer and early detection is so important then why don't we all go for full body MRI scans every year or so?

Seems at least on the surface that we already have a cure for Cancer and it's early detection. If it's a resource issue then why doesn't the government (or insurance companies in USA) simply buy a lot of MRI machines, seems they would pay for themselves though savings to the medical system.
gpt
Another thing to keep in mind is that while early detection is good, yes, MRIs don't just detect cancer early. They detect a whole host of things that are 99% of the time completely benign, however each of those things would still need to be looked into. That means extra cost of running tests, extra stress for the people undergoing these tests, extra man hours for doctors, all to detect something that... wasn't worth detecting.