I actually don't understand it at all. There are rooms available for next week. As there has been for months now.
If my family had been willing to travel the last few months, I'd have borrowed all my points to do so, so I'm not dealing with the "rush back to travel" that will likely happen late this year into next. (Leaving me with no points until late 2022.)
By stopping people who want to travel now, they are left with empty rooms that could maybe have been filled with people that needed to borrow to do so.
IMO, they should have allowed full borrowing of 2021 points but put restrictions on 2022 points. Seems like things would have evened out better. The people travelling in 2020 UY despite covid could have used theirs up, potentially freeing up rooms in later 2021/2022 for the rest of us.