Remember that FFXIV was designed with casual play in mind. Adding trash which provide no benefit (negligible drops) would do nothing but increase the time required to complete a dungeon. You must keep in mind that a lot of FFXIV players have full time work, families, school, and lots of other obligations and when they have time to play FFXIV they like to see benefits for their efforts. They don't want to waste time fighting trash mobs. Just because a dungeon's timeout is high does not mean that the dungeon SHOULD take that much time to complete. If a dungeon had a 9 hour timer should it take 9 hours to complete? No, it should probably have it's timer reduced. I fail to see any logical point in OP's post.