Now that rollbacks can edit protected pages, the only unique ability possessed by content moderators that they can delete pages, so I feel it's appropriate for them to gain the ability to edit MediaWiki pages.
Content moderators are trusted members of the community and if someone needs to make an edit to a MW page I'm sure they could do so. It would also allow bureaucrats to temporarily promote users so they can edit MW without granting full admin rights.
Vote Support, Neutral, or Oppose.
Edit: Proposal passed, locking thread.