Re-read @cinnamon1212 post above. If you are WL and you are a girl and the school is short boys, you aren’t coming off the WL. Your dorm is full!
Likewise, if you are the brainiest boy on the list and a good runner, it won’t matter if the school is desperate for boys who want to sing in the chorale and do theater.
It takes some special luck to get off the WL. It’s not like waiting in line to get a table at a crowded restaurant…