So if I'm a DD, and the other DD is playing super well, I can stop doing DPS and sit back and relax and focus on chatting, because the DPS is already being covered?
Your attitude reminds me of the healer I encountered in Copperbell normal yesterday, their choice of action was literally to /sit in the corner while the rest of the group was actually trying to get things done. No one wants this person in their team, no matter how mad chatting skillz they think they possess.
I suggest you ask yourself "if everyone in the group would put in as much effort as I do, would we complete the content [in a timely manner]?" If the answer to that question is no, maybe reconsider your attitude.