I would disagree with most of what you said except about the 9/11 points.
IMO, humans are afraid of getting a fatal disease. I don’t want one and most I know wouldn’t want one either. Is it being afraid? In a way yes. Does anyone want cancer or something else that may kill them in a year or whatever? Don’t think so. So with that reasoning you set up your next point, that people would crowd back into WDW if it were open today. I don’t think so. Would there be people going? Sure, mostly people thinking it won’t happen to them like the spring breakers. I believe the majority of people won’t get on a plane for awhile. I also believe a lot of families don’t even know how secure financially there family is with loss of millions of jobs. Thursday the numbers come out for the next updat on unemployment claims and it’s expected in the millions. So no, I don’t think you would see crowds as before this hit. Respectfully disagree.
I’m not a doom and gloomer, just trying to think things through and I don’t see it happening.