Why are low standards for dps acceptable?

[Iagainsti]

Meh, the BLM was being lazy, the Op had every right to ask why she was being lazy. Not agreeing with the way he asked but still feel he has a right to ask why she was being lazy.

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.