There are often bonus coffers that require to kill a few mobs to get. The problem is that nobody ever get them. Even as a tank, I get yelled at for opening them. Frequently nobody in my party will follow me when I go for a bonus coffer. They'll just stay there and yell at me instead.

Because some elitists decided that they personally don't want to open these coffers, then nobody does. They decided that. It doesn't matter whether the items can potentially be useful or not, or if coffers contain certain items that can't be found anywhere else in the entire game. Elitists do not care about that. They order you to skip them.

So my solution is to just remove these kind of coffers from the game entirely. Just put coffers on the main paths instead.