Not for one single solitary second do I believe they didn’t know about this ahead of time.
I think the plan was to have biden/harris win and then let this progress and biden dies in office and harris becomes the first (unelected) *black women* president, making history, even though she technically didn’t win the election.
Then TPTB finish destroying the country in her name.
But Trump won.......
I also do not believe that they knew he had cancer.
The conspiracy theory that I find far more likely is that they avoided medical examinations for fear that his physical and cognitive ‘decline’ would be discovered and leaked.
They didn’t just hide Biden from the media. This controlled everything they could about who had access to him, and how those people would be allowed to interact with him.