However, they are all part of the same corporation, and they certainly could work out the internal accounting.
If (and it is a important if), there are going to be a lot of vacant Disney owned hotel rooms, the marginal cost to Disney Corporation to fill those otherwise empty rooms with DVC members who had points expire is very low. Especially since DVC members get very limited housekeeping.
The amount the members would spend on all non-room Disney expenditures would probably be more than the marginal cost of "giving away" the hotel room, so on net Disney Corporation would come out ahead. However, if those rooms would have been occupied by cash paying guests, it would not make financial sense for Disney Corporation to give them to DVC members who had points expire.
It would also not make sense if Disney wants to limit attendance when they re-open.
That may be what Disney is evaluating now, and what they decide to do, if anything, with regard to expired points will depend on how may points expire and the projected occupancy of the Disney owned hotels once they re-open.