How would an optional, official parser be toxic?

[Jijifli]

People will attempt to game the parser system for themselves and others, especially if said information can be looked up and the person judged for content outside of raids. Uploading a parser system will make people a hell of a lot more paranoid about the game and whether they can participate in content, or whether their attempting to learn, or the actions of their teammates, will affect their worth as a player.

They could do what WoW does, where they don't officially have one, but they allow them to exist.

This removes the feeling of requirement from it, while those who still want it have the option for it.