I'm surprised this hasn't come up, but I think one reason why FF14, a Japanese game, doesn't really support parsers and such, is because it is expected that people will do their very best when they sign up for Duty Finder in JPN. It is shameful to show up to a trial/raid/dungeon with complete strangers, and perform poorly or be a detriment to the group. As many have noted, it is the idea that every single player needs to take responsibility for their own performance and not let down the group. None of this "I play how I want, even if I'm in i130 doing 200dps" -- rather, it is usually (not always, of course) "I play to the best of my ability so as not to be a hindrance to others in my group and ashamed of my own performance".
I'm not saying that parses or not are a cultural difference -- but I am pointing out that in many respects Japanese players, where this game is developed, will generally not need parsers to tell them they are doing badly. They know it, they take care of it, and they do all of this before entering into a public Duty Finder party so as not to disgrace themselves and let others down. NA, on the other hand, I've not seen quite this level of personal responsibility.
*Note - I know the major world first JPN groups parse - as is needed when doing cutting edge progression w/ no echo or overgearing*
*I'm Asian, myself, and yes -- the whole group before individual is very much a part of the culture ^^*