I'm not convinced anyone in Congress has read that tale.
She was basically trapped in the job when the Senate refused to appoint Obama's pick to fill the vacant seat of Scalia. If she had retired it would have just been two empty seats for Trump to fill quicker. People were actively asking her to stay in the job.
Feinstein was a democratic senator in a democratic state with a democratic governor. She was actively being told she was unfit. She should have just retired.
https://www.nytimes.com/2020/09/25/us/politics/rbg-retiremen...
I still remember the plethora of articles about RBG's supercool workout regimen dating back to the early 2010s because she was diagnosed with pancreatic cancer in 2009. The fixation on her health was largely because everyone knew this woman was getting ready to kick the bucket at some point, but she refused to make her exit before the Republicans took control over Congress.
Just some examples of what I'm talking about as evidence:
* https://www.yahoo.com/shine/healthy-living/ruth-bader-ginsbu...
* https://abovethelaw.com/2013/03/meet-the-personal-trainer-to...
* https://www.washingtonpost.com/style/personal-trainer-bryant...
* https://time.com/4804007/ruth-bader-ginsburgs-workout-book/ (a bit later but you get the idea)
https://www.latimes.com/opinion/op-ed/la-oe-chemerinsky-gins...
Obama met her when Democrats had a majority, and IIRC obliquely inquired/suggested that she retire and she brushed it off.
Obama may well have been right. But the suggestion should have come from one of the other liberals on the court. (And it may well have, for all we know. But we wouldn't hear about it one way or the other.)