It's very easy to automatically reject someone - either by a system that processes resumes (so a person never sees it), or a person who doesn't understanding an

It's very easy to automatically reject someone - either by a system that processes resumes (so a person never sees it), or a person who doesn't understanding anything about the job rejects the resume wihout reading it, or because they aren't hiring anymore, or sometimes because they were never hiring in the first place and the job ad was there for the sake of appearances or to tick of a legal checkbox (e.g. there might be a requirement that all jobs are open to external candidates and the company is only interested in hiring internally so they put up the external ad as a formality). This is why you shouldn't take rejections very seriously.