Why are low standards for dps acceptable?

[Andrea]

Or misinformed and didn't understand the abilities, which is possible. Either way the right to ask was trumped by the line of questioning, apparent in the screenshot.

If you dont understand your abilities why on earth are you doing content at level 60? Knowing what something does is the first thing you should do when unlocking a skill and if you don't understand your abilities and refuse to find out what they do you are indeed either lazy or incredibly rude to the other people you get stuck with.