Faolyn
(she/her)
I think you'd have to show that the individual or small group has it correct and the masses do not.Even when that individual or small group has it correct* and the masses do not? Science, for one thing, would not have got far without specific people at different times taking a stand saying "Yes I'm right and all of you are wrong".
* - as opposed to merely thinking they have it correct.
Which you almost certainly can't do, because I'd wager about 99% of gatekeeping is based purely on one's opinion of what makes up the "real" thing.