The mainstream media happily played along as well.
You're definitely correct, that you don't go from a "clean bill of health" to stage 4 prostate cancer that has already metastasized to the bone in just a year (he allegedly had a full physical right before he fell flat on his face in the summer debate of 2024).
The only time prostate cancer can get explosively spread is if it's already in stage 4.
I'm pretty sure he's had stage 4 cancer for quite a while, and that the medical staff has been able to stave it off using immunotherapy. Had he been receiving chemo or radiation, that would probably have killed him, since he was all but dead on his feet for the last several years.
Immunotherapy can work wonders, but eventually cancer mutates and an advanced stage 4 cancer can certainly spread in that nasty manner in a short time period. I suspect that the cancer had recently undergone a new mutation and evaded the immunotherapy markers.
Shame on those who covered up his bad health throughout these years, and especially a big middle finger to the mainstream media for pushing the false narrative of Joe being as sharp as a tack, and as healthy as a horse.
Shame on those on the left who attacked us for pointing out that he was a dead man walking for the last several years, calling us conspiracy theorists.