User blog comment:TimmyQuivy/On the Importance of Upgrading MediaWiki/@comment-24258073-20200509133445/@comment-5288784-20200511171345

This is probably not the priority. It seems to cover all the common messages that you might want to edit, and if you need something else, you are able to request it to be edited by a staff member.

Whenever a new item is added to that list, it's basically an invitation to edit it. Perhaps some of it Fandom would prefer not be altered without a really good reason, and thus remains off the whitelist.