How would an optional, official parser be toxic?

[JohnSpawnVFX]

this is more about the people who can do the content, but would take longer. You're delaying them further by the gatekeeper. It's sort of an extra penalty on those who might be willing to try it. If it takes long enough, you may just end up not completing a raid tier when its useful because you still need to go through the static/pug rigamarole, but it's worse since the keeper sorts out all the other players by then; they have it on farm, you are just starting.

If the gatekeeper has several mechanics from the following raid tier, then you're actually preparing people for them ahead of time, because if you can execute them on the gatekeeper, you can execute them on the raids themselves.

..and honestly, the carry thing gets old. If the dude tries and fails, and people manage to win, the proper response is not "lol, carry" but "let's do it again and work on it some more." And this game you lose nothing...imagine in games where just to do savage, you needed a 10 million gil pop item, or to farm a mob for four hours for a pop, and people still didnt complain about carries as much as here. Most of the problem here is people are too selfish and too lazy to form actual raiding statics or guilds or to teach or mentor players; they just expect everyone to do it right first time or its a carry. They have no patience, no empathy, and despite this game being the friendliest endgame in any mmo with its time burden they treat it like you just cost them a year of effort if something happens.

It's no big deal for the person being carried. After all, they're not the ones making an effort to compensate for the person not giving their all in the fight. If such a person was in one of those statics that prioritize loot based on necessity and performance, it would take a while till that person got ahold of a gear piece.

I mean, this is the game where players complain if you watch a 3 min cinematic before a trial. Literally had someone gripe about cape westwind cs and told the person to watch it in the in.

You also have people complaining that a MSQ fight easier than most dungeon bosses is too hard, so it's not like it's just one side at fault here. Plus that's on SE to fix, not people to endure.