Definitely agree that people aren't flying. Some of that is due to not feeling safe, other is due to the already miserable experience being made even more miserable. Most of the people I know that are traveling are doing so via car specifically because they don't want to deal with all the hassles of flying today.
At the same time, it's difficult to compare beaches to Disney-- I may make a trip to the beach for a "cheap" get away, but the cost of going to Disney is MUCH more expensive. A number of people I know that would love to go to Disney just can't see the value in going at the moment due to the price/value proposition (lack of entertainment, shortened hours, required park reservations, and yes masks to a greater or lesser degree for a "full price" ticket);
Given the number of people concerned about not being able to send their kids to school, I'd expect the same number of people would feel safe going to Disney.
Basically, I'm sure some people aren't coming to Disney because of safety concerns, but I'm sure others aren't going because of financial concerns (lost their jobs), and still others aren't coming because of perceived lack of value/experience.