How would an optional, official parser be toxic?

[Bourne_Endeavor]

That's not my point. It can't be a gear check, because the issue people want gatekeeping fights for is not gear, but skill. And if they don't have the skill to beat it on launch, they need to practice till they can or they can't enter the instance. If they need to rely on better gear to beat the challenge, then it will be too late. You won't be able to be understanding, the gatekeeper will keep them out of the fight. The point is that with a gatekeeper like this, it will delay people from entering to prevent that. And by then, there won't be people who need newbies.

If they cannot beat this hypothetical gatekeeper, they have no business joining parties for that piece of content. You acknowledge they lack the skill outright and may struggle. Why is it because who don't lack said skill obligated to carry this person through content? If I set up a Suzaku farm party, this means I expect people to know all the mechanics and have cleared the fight preferable multiple times. Now I certainly won't kick people for mistakes here or there. We're only human. Mistakes are going to happen no matter how good you may be. What I don't appreciate is someone who has no idea what they're doing yet expects the rest of us to muscle through because they're somehow entitled to our time.

Regardless, people aren't necessarily asking for a "gatekeeper." A parse simply holds everyone accountable. If you're a Samurai pulling 3,500 DPS, you have no business being in Tsukiyomi EX. You're a complete liability to everyone else, especially in a farm party. That denotes someone who is simply trying to leech off other people's effort.

Yeah see the wrong hands are the problem.. they seem to be more frequent.

That simply isn't true. You may hear more about toxic example, but if used that as a basis, FFXIV is in dire states and ready to shut down at any moment. Put simply, people always talk about negative things more than positive. You can have a hundred people use a parse as intended, and be pretty chill about it. Then one jerk comes along and they're the only person who will get any attention. Why? Drama is more interesting to discuss. There isn't much discussion to be had from a positive experience, which is why they're less likely to occur. A prime example of this is Ultimate clears. Some groups post their clear video on reddit and see no more than ten posts and a couple likes. Create another decrying Ultimate as a waste of resources and you'll see hundreds of comments in a matter of hours.

Parsers work in a similar fashion. In fact, from a purely anecdotal experience, I have see more toxicity from people clearly not using a parser than I ever have people who do run one. And in the cases where they outright admit to using a parse, they aren't rude. Meanwhile, I've had DPS bitch incessantly about low damage only to glance over and see I'm out-dpsing them on Warrior. Perhaps my favourite instance is a Samurai who called a friend and I "shit" when said friend said "Okay. I think I'm out. Some people clearly don't know the fight." This was after our third wipe. She was doing almost double his damage with only a slightly higher ilvl. She was actually doing double the Dragoon's damage. Meanwhile, I wasn't too far behind her. And I was at a lower ilvl. But Mr. Samurai here thought he was amazing.

A parser wouldn't make him a jerk. He already was one.