Another point... again to be fair, Disney is still employing at least 50,000 people in Florida and another closing would likely result in far more layoffs than the first did - potentially a LOT more people losing their income and health care. I'm not defending their current decision making process and I feel that they have made some very poor decisions throughout the past 8 months, but it is another factor to the equation that sometimes gets overlooked.
Also, if you acknowledge (not necessarily accept) the fact that they were open in July with a local positivity rate over 13%, then being open now with a positivity rate under 8% seems... dare I say logical? Now, I'm not sure that there is much logic to them being open at either time, but it's hard to argue that they should close now when they weren't closed then.
And... my final comment on this Sunday morning - historically, WDW's biggest crowds from the US tend to be from the northeast, where all the states are currently in the bottom half of US states in terms of testing positivity rate, hospitalization rate, and new cases per 100,000 population. Granted, all states in the US except a small handful have alarming numbers at this time, but it wouldn't be a giant leap of logic to say that the majority of those who are actually traveling to WDW are not coming from the hotspots in the US.
Again, just to be very clear, I'm not defending their decision to be open right now (or in July, for that matter) but there are certainly many factors that they are weighing and there are some that I think can be said to lean in their direction by comparison. I am extremely hopeful that maybe by next Summer we are all looking at this in the rearview mirror and shaking our heads at the stupidity of a lot of decisions that have been made by a lot of people during this crisis.