The toxicity starting to happen.

[phantomr23]

Quite bold of you to suddenly assume that I don't play my class right or keep up and hold my own just because I'm arguing that discovery is more fun than following someone else who already did discovery and took the fun out of it. Yes it's group content, but that doesn't mean you can't still play the days when wiki didn't exist and games were free to be explored.

This is the reason I never got into WoW after playing it a few days. It's so old and every secret has been discovered, every play style tried and so many users that you're just another face in the crowd. In FFXIV, you can feel important, you can still travel the world and find things others haven't, secrets they may have missed, find and customize your own play-style and be more than just another mindless player signing on to check a few things and bye. Maybe that's just because it's still newer than WoW, but it just feels like there's more to explore and discover still, and the game not datamined or played to the point of being repetitive.

But that's off-topic. Point is, yes, people should read what the game offers of their class notes and quests to the point of learning their play through the game.
But it is being very controlling to tell people to go watch videos and read guides other members made if they want to learn the ropes through trial and error on their own.
I didn't say not learn their class, I just said learn it on their own through mistakes, the way we learn IRL.

The main issue with this is that the gulf between the way you'll likely play a class if you're playing it through your own interpretation and the way you should be playing a class can often be absolutely massive. Take healers, for example - they all spend roughly 50 levels with about 1 oGCD heal at max - the most popular one, WHM, doesn't get a single oGCD heal until level 50 itself. Given that, it's no wonder a lot of players gravitate towards playing healers totally wrong, the game builds them to rely on GCD heals which are notoriously slow when damage spikes, meaning they probably spam them and are a little too scared to push out any damage. So if you're in level 60 content and you're still doing that then it's not exactly surprising, but it's still very much not the right way to play the game. Why shouldn't the community take it upon itself to help guide people in the right direction? When the game is unintuitive there's no other avenue; you can learn something like Paladin, Dragoon or Samurai relatively fine on your own, but there's massive gameplay factors that are hugely important to most jobs which the game doesn't explain. The rate at which DoTs tick, the way healers and tanks should also focus heavily on damage, hell, even the differences between Slow, Bind and Heavy (and why that matters so much for Arms Length) - the game just never gives you the information to figure out a lot of jobs to a decent degree solely in game.

(Also, in terms of job performance, "your own play-style" just doesn't exist. There's a right way to play a class and then various degrees of "less right", a lot of which are perfectly viable if they're in the right ballpark. It's not particularly fun to hear, but it is also just a fact of the game's combat.)