How would an optional, official parser be toxic?

[Dualgunner]

You already have it: Stone, Sky, Sea.
If you pass it, your stats and rotation are enough for the fight. Too bad too much people even ignore its existence.

It's not a gatekeeper to the fight though, if you're hoping to add to that discussion. Its not a good alternative to a parser either. It's a good 3 minute rotational learning tool, but it's not much else.