Like I said, I am not an attorney, but if you sell a good/service and can't deliver the good/service, and are unwilling to refund the money, that can and should be categorized as theft. You were willing and able to receive good/service but it was not provided to you. Plus you are the consumer, they are the business (both the
DVC Owner and the Broker) and hold a larger fiduciary obligation to you. Yes, most will argue with me that they are simply renting their points, but by doing so, you are assuming the role of a business. Think of it this way, Airbnb is refunding all renters at this time, even though most of those contracts are nonrefundable. I just don't see how you can keep payment for lodging that is no longer available.
Added:
Whatever lose the DVC owner has, they should take it up with Disney. Yes, your contract says that the reservation is nonrefundable, but your contract also says that you will be provided with lodging at a certain date at a certain resort. A contract has to be 2 sided, at least that's what I remember form business school and it has been a while. You get X they get Y.