To be fair, you don't have to be 100% optimal to clear almost anything. We had a drk clear a12s before stormblood launched using literally nothing but flash. You have zdps healers getting carried through content every single day. You have no trick attack ninjas, no dot samurais, heal-happy rdms, clearing content all the time.
Does the fact that they can still clear make any of that ok? No, at least not to me. I don't really like wasting other people's time, so I like to play optimally, and if I'm playing with someone who's clearly playing un optimally then I'll try to help them out.
