A question was migrated away from Judaism.SE. Now it is sitting in the archives of closed and locked questions, with an obsolete tag. I want to delete it, and purge the obsolete tag from the face of the planet! But (I assume because it is locked) I can't vote to delete it.
Why is a migrated question locked such that it can't be deleted on the site from which it was migrated?
Note: not a dupe of Can't vote to delete migrated and subsequently closed questions - I am asking about migrated from, not migrated to.