The problem right now is that not sending a rejection email is the status quo. So you have decent people and non-decent people both not getting back to rejected

The problem right now is that not sending a rejection email is the status quo. So you have decent people and non-decent people both not getting back to rejected candidates. If sending rejection emails became the norm, we could assume that not getting one would be due to the hiring manager's personality as opposed to a company policy or industry best practice.