Stack Exchange - or more precisely their moderators and power users - gets to decide which content is allowed and which isn't. For example which questions are m

Stack Exchange - or more precisely their moderators and power users - gets to decide which content is allowed and which isn't. For example which questions are marked duplicate (even if they aren't) or which questions are off-topic (even if it's not clear). And yes, theoretically the community can change the guidelines. But at one point the organizational inertia is so big, the proposition becomes "take or leave it". And it's not just Stack Exchange that has this problem. Wikipedia too.