Why are low standards for dps acceptable?

[Andrea]

In regards to a BLM using only their 2.0 rotation and nothing else not belonging in level 60 content I might agree with you if only it was required that they MUST use their 3.0 rotation to complete the content.

Just because you don't need to do something doesn't mean you shouldn't do it.

A tank can just spam flash and nothing else. Should they do it? No of course not they should help kill things.
A dragoon could just do heavy thrust and nothing else and clear a dungeon. Should they do it? No.

It not only makes the run take longer than it should but you are also slowing down 3-7 other people because you simply refuse to learn a new rotation. Im sorry but that is 100% rude in anyway no matter how someone tries to defend it.