These are owners who own points that are in circulation and with the right to use them. Do you expect these owners to simply let their points expire, unused? Because that's the only way that true availability will open up.
You must have missed this part of the email or missed the meaning:
"To help you cross different destinations off your bucket list, we are continuing our efforts to prioritize owner reservations by limiting access by non-owners at select resorts during peak travel times. Since we began these efforts in March, we’ve heard feedback from many owners that you’ve been able to achieve your vacation plans and visit many popular destinations during your desired travel times — and that you’d like to see these options expanded even further. "
Sure the same points will be used oveall, but the policy is pushing out non-owners to make way for owners to use their points to reserve these reservations and stay in the units -- you know, like a vacation Club instead of a rental business.
"True availability" will not change, but "
owner availability for personal use instead of non-owner use" at some of the most sought-after resorts during the most sought-after times definitely did change in favor of owners wanting to take their families on a primo vacation.