How would closing one value or one moderate 'alienate' someone? Because you can't stay at your favorite 'theme' you are going to take your ball and go home? What if that theme didn't exist in the first place, these people wouldn't go to WDW?
That just doesn't make sense.
If bookings are so low that they would have enough empty rooms to warrant this, then yes, they would close resorts.
But make no mistake, there is no way there would be closed resorts and them telling people that want to book, 'sorry, no rooms'. It wouldn't impact your trip. You just wouldn't have the option of booking the closed resorts, like they were booked full or undergoing a refurb.