This would be EXTREMELY challenging to code. Would have multiple, hard to code objectives for 24 separate dungeons. Most have something finicky that goes AGAINST most rules that the bot does already. (ie: Firebird Set - Has you intentionally die, while surrounding yourself by as many enemies as possible for the meteor to hit). Not only that, but sometimes they have weird gear requirements or moves to make them work. (ie: Firebird Set - I was outputting way too much damage to get things to burn without killing them, so I had to take off a majority of my gear and gems to work, as well as needing fire damage moves on).
They are also not too necessary since they are pretty much a one and done, and doesn't do much for the player. (Cosmetic or stash tab).
I agree it'd be great if they did it, but I'd rather them stick their resources into stuff with MUCH better value for their time. It's probably one of the few things left that the player would be better off doing.