Called admission and got the general "waitlist movement has started and to continue until classes start"

Its so frustrating. Why do they have to keep SO many people on the waitlist. Why are they so secretive about the waitlist movement? Why can't they just keep maybe 20 once the deposit deadline passes, and let the rest of us go so we can make peace with our plans and just got with other schools? Many are reapplying too so like hello? Be a little more considerate, considering the school in question apparently prioritizes mental health and all