Tanks I think have been programmed to speed run as much content as fast as possible imo. Most people want to be in and out of dungeons as fast as they can unless they are brand new to it or are farming loot for a new job. If that's something that's agreed upon and feasible depending on the content level then that's fine, but the problem is when other roles (DPS mostly) force the tank down the SR role by taking over their job if they don't approve of the speed that they handle the run, or by the tank not assessing their party makeup well enough to know SR's just aren't possible with two melee in a dungeon...but they do it anyway. With the content as grindy as it is now I can't say I blame them for trying to SR with the relic dungeon drops though. SE is kind of forcing it on them if they want to finish their relics. Its the same with other classes though too, they just don't happen to be in a role that sets the pace of a dungeon.