My sister-n-law is a surgical nurse who made BIG bucks in Fort Worth. She took every covid shot and booster they made, and chastised the rest of us for not doing so. You couldn't tell her anything bad about the jab. Then, she woke up one morning shortly after taking the latest booster, and she was blind. Not just a little blind, but "can't see your hand in front of your face" BLIND. As a health care professional for years, she has access to the best in the business, and NOBODY can diagnose why she was blind. She remained that way for over a year! Then, she began to regain some of her sight. But, she still can't drive, and her career as a surgical nurse is over. But, she finally made a statement at a family gathering that nobody expected her to make: "I wonder if there is a chance that the booster caused my blindness?"
As smart as they are, some of them just don't get it.