Earlier quoted context omitted.
Sometimes 'gatekeeping' is a good thing.
I think the word you're looking for is curation. Which people who don't pass jury might call gatekeeping.
In which case, I kinda disagree. Substandard work is typically submitted by people who don't "get it" and thus either don't understand the standard for work or don't care about meeting it. Either way, any future submission is highly likely to fail the standard again and waste evaluation time.
Of course, there's typically a long tail of people who submit one work to a collection and don't even bother to stick around long enough to see how the community reacts to that work. But those people, almost definitionally, aren't going to complain about being "gatekept" when the work is rejected.