Look the reality here is that WDW is much more a "vacation destination" for people than UO. They have a far higher percentage of local and regional guests than WDW. The out of state guests they do get are generally "add-ons" from WDW. Meaning WDW is a primary reason for visiting. This, in general, makes it a lot harder for WDW to open when there's still travel advisories, outright bans for international travel and the possible necessity of re-closing when guests have flown thousands of miles to attend.
All one needs to do is look at CityWalk, which has seen a relatively steady crowd of guests and DS today and yesterday, which has dwindled down to the dozens, to see there's a difference in guest contingency.
UO is a lot closer to DL in Anaheim, in terms of guest make-up, than it is to WDW.
This is a novel virus. It changes based on research and science. Anybody who has even read casual news stories about so-called super spreading events have seen its because its a bunch of people in tight proximity to one another, usually inside (churches, nursing homes, etc) breathing the same air, NOT because they are touching the same surface. Surface to human infection was always a possibility, and still is, but is by no means ever believed to be the primary method of infection.