So, are you saying that expecting basic competency in something like a level-capped dungeon is wrong? Should we not expect healers to know how to keep a tank/the party alive? What about the tank? Should we not expect them to hold aggro and use cooldowns appropriately? Should we not expect DPS to AOE in the appropriate situations? Because this is the type of play I expect. If people fail to meet it, I am well within my right to be dissatisfied. Randoms or not.
There’s a vast difference in “practicing a level 70 rotation” and “failing to do something as simple as AOEing when appropriate”. Or “failing to use cooldowns when appropriate”. Or “failing to make appropriate use of regens/shields/healing abilities”. All of these examples are things that players have access to far below level 70. Most DPS have AOE skills sub-level 30, yet there are so many in Expert Roulette that insist on single-targeting mobs in a pack of 6, 7, or even 8 mobs.Some people even use level 70 dungeons as training grounds to get familiar with their rotations so that they can later feel more confident against EX Primals or savage; and that's completely natural because dummies do not provide you with a real context where you have to handle your rotation all while dealing with a certain amount of mechanics (even if they are simple).
There’s also a huge difference in “practicing a level 70 rotation” and “failing a mechanic that has been present multiple times in multiple instances before now”. Do you know how many players I see in V12N run away with the stack marker? Yet stack markers have been encountered since level 60+ content repeatedly (Void Ark, Final Steps of Faith, Sirensong Sea). To name an even more common one, just the basic orange AOE circle. Yet how many people fail to dodge those? Expecting people to dodge the pretty orange circles on the ground is not a high demand.
I’d wager to say that “performing the basics of your job at level 70” probably fit into a lot of player’s “acceptable levels of gameplay” for dungeons. There’s no excuse to be level 70 and performing a single-target rotation in a huge pack. There’s no excuse to be level 70 and not using your defensive cooldowns or not maintaining aggro. There’s no excuse to be level 70 and using only Medica II to heal a tank.You are setting up for disappointment if you expect high level of gameplay in dungeons. And "acceptable levels of gameplay" falls into the ambiguous category. "Acceptable levels of gameplay" will vastly differ from one player to another.
You probably think I’m exaggerating, but I can assure you I’m not. There’s an entire thread dedicated to DF horror stories, and the above examples I have listed are far more than just random examples—they’re common occurrences.