That was very interesting to read, thanks for posting it.
Too bad FDR's legacy is the nanny state and his champions the feeble democrats. Had FDR been a good conservative, the wheel chair would have never made it into the memorial. We'd have protected his memory the same way we protected Reagan's memory when CBS (or whichever one it was) tried to run a miniseries about Reagan based on fabrication and using Barbara Streisand's husband playing the President.
As it is, FDR's champions, weak as they are, want to glorify every flaw. It's not a compelling story for them if he didn't rise from adversity, with his adversity, of course, the central character to the story.