I’m curious if you have much evidence that this is common? I suspect it’s mostly a myth that is easy to believe (it can feel good to believe it because it means you were removed from the applicant pipeline because of stupid computer reasons rather than because you don’t appear to meet some bar to a human, even if that bar is a stupid thing like prestige) and oft repeated.
I definitely think it’s likely that most people on hn don’t work for companies that do this, but maybe hn just skews toward certain kinds of tech jobs.