The problem is that sending in a resume and applying for a job takes effort. If you invite people to spend time and effort and mental energy to get a thing (job) when you know you won’t give it to them, then you are wasting their time and effort and mental energy, which I can tell you as somebody who fucking hates looking for jobs, that mental energy can be in serious short supply for people looking for work.
That “fresh pile of resumes” is definitely good for you when you want it, but the giant stale pile of resumes that you keep throwing away is not free for the people sending them in.