Yes, you've added a number of good and important points. I've written more about the cognitive effects of long COVID, and how it resembles ADHD, here: https://medium.com/wise-well/long-covid-looks-surprisingly-like-adhd-7d5efebad0e4

There's also plenty to discuss regarding how our society treats disabilities, as well as how we treat the appearance of disabilities. I didn't discuss that Biden's poor debate performance doesn't necessarily represent his current abilities. On the other hand, part of the job of president is to project leadership and competency (whether or not one even possesses those traits.)