I've already withdrawn mine so don't attack me. This is for the argument that "some people have those safeties as their dream schools" If for example, I get accepted into two places in which one institute is my safety and the other my ED. Then, even if due to me, some person was unable to get a spot on my safety school, when I deny my acceptance to the safety after enrolling to my ED school then won't the safety instead just get another student. It's not like they don't have enough students in their wait list or RD round that would still get that spot if someone else denies the admission. Idk if was able to properly convey my argument but yeah that's what I think.