I don't want to get into an economic discussion here -- that's for the politics thread -- but these studies are conducted by people I trust with no agenda whatsoever. I take it for what it is - separate and apart from everything else.
Actually, the people doing the studies do have agendas, as most of them are paid for by the government.
So, the idea of reopening any entertainment venues, including theme parks comes down to one fundamental question:
Do you trust the government (federal, state and local) completely or do you think the government is testing us to see how much of our liberties we are wiling to let them take in the name of safety?
If you completely trust the government, then the theme parks should remain closed until they say so; however, keep in mind the theme parks can't remained closed indefinitely, even once CMs are furloughed, there is still a lot of expense being incurred. And California's economy is heavily dependent on entertainment and theme parks and if the theme parks fail, so does California's economy, which is the 5th largest economy in the world. That also means, the U.S. economy fails and we end up in a depression, which would have devastating effects and make the deaths caused by Covid-19 look small with death on a far more massive scale and in ways that would be even more heartbreaking than what we see with this disease.
If you don't trust the government, then those that are insisting we reopen things are most likely suggesting the correct course of action, as we the people need to be willing to stand up and say we will not let our rights be trampled in the name of safety, which would also include reopening the theme parks.
So the reality is the theme parks and other entertainment venues need to reopen in the relatively near future, not matter which position you take, otherwise we are looking at death and disease on a scale we can't even begin to fathom.
Now there are logical things that can be done, such as reducing max capacity (which Disney parks should have done long ago just to keep the park crowds at more comfortable levels), more virtual queues, but then you need somewhere for people to safely go while waiting, so there will need to be more show venues setup, as each venue would need to operate at reduced capacity. Quick Service could become mobile order only, lids for drinks will need to come back, all resorts will need to switch back to individual amenities instead of shared amenities. We could see all attractions with FP becoming FP only, when you return, you would go through the standby queue and the FP queue would be for those with DAS, wheelchair, over a certain age (in other words high risk) and guest recovery. We could also see something like the parks allowing those that are high risk to enter the parks two hours early with everything running. There will also likely be permanent hand washing stations setup throughout the park. But really, I think all restaurants (everywhere, not just in theme parks) should have hand washing stations setup outside of restrooms, they do this at most places in the Philippines and it really makes a lot of sense, no need to go into a restroom just to wash your hands.