If the content isn't on the chain itself then the entire exercise is pointless since the content is the thing that people care about (whether they want the content to stay or go)
When did I say it isn't? The idea is that some blocks can be accepted in lieu of the original if signed by certain entities that have been voted in by the community. In this way you can change previous blocks in the chain.
So you haven't actually achieved anything there, then. You still have certain people that the community elects or appoints by whatever means, that can make retrospective edits unilaterally.
What you're really talking about here is a change of governance model to allow editors to be removed more easily.
