My personal opinion, but I feel like Disney is one of the safer places you can be right now. Lots more sanitation being done than most of our local places, much better mask enforcement and compliance than the average place. I think that most people who travel to Disney know the rules in advance and are prepared to comply with them, a whole lot more than a lot of the local yahoo's who don't give a flip about others.
If they opened with Florida having 10,000 plus cases a day, and are remaining open with still that level of cases, what is it going to take for them to close? 20,000 cases a day? Cleaning, wearing masks and physical distancing has proven to keep the cases down. Disney is doing that better than just about anyone else right now. Just my humble opinion.