And again: No one is talking about making it "as fast as humanly possible". No one is asking that everyone should be pulling purple parsers. At least I'm asking for everyone to pull their weight with in appropriate boundaries. Anything that isnt pressing buttons at random on your keyboard is already "optimization". Following your rotation is "optimization" - you seem to have missed that point.
Yes, I dont need a parser to see that this RDM isnt AoEing when they should, but a parser can definitly make it easier to spot that (instead of having to look at peoples castbars 100% of the time - which is something I can do when playing tank, but if I'm dpsing myself, I'm way more focussed on my own rotation and with a bard as a main-dps on procs etc.)
Not everyone run has to be finished in 10 minutes - but a run also doesnt need to take more than half an hour to complete, considering that the average clear time is something between 15 and 20 minutes.
Also: Content is not always moving along without wipes. Most of the time it is, but since we dont have a permanent "Hallowed"-buff on everyone for the duration of a run wipes do happen. It might even be really easy to pinpoint why a particular wipe happend or even who caused it. And at that point its all about attitude - and that goes for everyone. While no one needs to be harrassed or insulted about causing a wipe, that person also needs to weither take advice on how to handle whatever caused the wipe or, if they cant or dont want to do that, leave the dungeon. Preferably on their own account, but going by some statments here I'm wondering if a silent kick without offering advice first might not even be the better way to go, to not offend anyone...
Sadly, enrages arent really a thing in "casual" content - technically some bossfights have some sort of enrage, thinking about Vishap for example or, as I'm assuming, the last boss of Amarout - which in turn means that dps-jobs can get away with extremly poor play without any real consequences, which leads to this idea that you dont need to care or take this content serious since its trivial anways. I'm not calling for Savage-difficulty, but without enrage the burden of a dungeon-run isnt really distriputived evenly. A dps can die their way through a boss-fight - if the healer dies and you dont happen to have a RDM or SMN around or a tank who can heal through the rest of the fight, its game over.
And its okay that some jobs carry less responsibility than others - but as it currently stands a dps can roll their face over their keyboard and the dungeon will still be cleared if the other 3 people are playing decent and thats somehow okay with you?