DF dungeons are a bad base line to determine much because you can get away without playing optimally, 8 times out of 10 I assume people are just there to get in and out and do the bare minimum and are probably watching netflix or eating lunch at the same time as doing their roulette.

So I would argue that most of the time you are seeing someone who is bored and just doing their "chores" for the day so they can keep up to date with gear progression.