Steering this back to the parks, some blame has to be put on Disney's operational choices here in my opinion. Plenty of other California parks have found ways to do limited, profitable reopenings (Knott's, Discovery Kingdom, SeaWorld, etc.) Will business be booming? No. Is employing some cast members, entertaining some guests, and turning some profit massively better than not doing those things? Yes.
Disney should have been significantly more creative months ago like their competitors have been—they might not be up such a creek right now if they had.
DISCLAIMER: I think California's current parks policy is garbage and should be revised. That said, Disney could and should have saved some of these jobs and some of these losses regardless by means of special offerings as we've seen from their neighbors.