Because you have the word tank, not dps tank as your job, so the assumption is that I am a tank I do low dps, but I got good defensive abilities that the other jobs don't have. This really stems from other games I would guess. FFXIV tanks are more of a dps with tank abilities if you want to look at it like that. But that is also a mindset of NA/EU, from what I have read the JPN community tank stays in tank stance if he is on the boss, they don't swap out to dps stance and dps, that happens on EU mainly. I can't remember which twitch streamer I was watching when that comment came up tbh!
