How would an optional, official parser be toxic?

[Deceptus]

Maybe it's just me but I would rather DPS focus on the fight not the meter because "OMG parse"

or a tank focus on tanking not the meter because "OMG Parse"

or a healer focus on healing not the meter because "OMG Parse"

But hey I am not one of the "Better players". I'm just a dude that has fun.

The only time generally anyone with a parser looks at it is after 1) a clear or 2) a wipe. After a clear to see how they stacked up or after a wipe to see where they need to improve. I can't think of anyone who really pays attention to it mid fight.