How would an optional, official parser be toxic?

[Berethos]

have you ever played WoW? unless you want the FF14 community to turn toxic the last thing this game needs is a dps meter

Funny thing about WoW...the official stance by Blizzard (last I heard) was that they don't want to mandate the use of damage meters or parsers either, which is why they've never offered one that is built into the game itself.

The main difference is that they officially allow and support players creating mods that tap into their API, and one possible mod that can be created is the parser.

So while the officially allow it, they are like SE in that they don't want to require players to use it, and as such have never added an official Blizzard-crated parser.