Those who are worried about their own numbers (in some cases monitoring the numbers of others) are already parsing at this point. I'd rather resources not be funneled into an official parser that will probably not work well knowing SE's soft handed approach.

The only areas of this game you will find any sort of parser is in the "competitive" areas, such as PVP. I don't think SE is interested in making PvE competitive among players. As for how toxic it would be, you need only look at every other MMO with an in-game parser to see what happens. FFXIV may not turn into the most toxic MMO in existence but even a game as friendly as this would see a negative shift.