Aside from the people who wrote and created the guides I used to improve, nobody had to allow me to do anything. You don't need a team of 7 people to pamper you to learn or improve. You just need the proper mindset and good guides / advice. There is plenty of good advice and guides out there. What's lacking is the mindset of improvement you need to make use of those resources. Instead, you have people with garbage fundamentals complaining others won't give them a chance when they obviously haven't given themselves a chance.
They're basically that kid in school that never does their homework, bombs all their quizzes and tests, fails basic algebra, and wonders why their teacher won't let them into their calculus class.
You have a fundamental lack of understanding of end-game. If all you had to do was pay attention to mechanics, any mechanic would suddenly become significantly simpler. What complicates mechanics and what frequently causes mistakes is the fact that you're also occupied with tanking, healing, and DPSing. You are hopefully trying to efficiently use your GCDs / casts in an optimized rotation, weave your oGCDs, refresh your DoTs and buffs, manage your CDs, manage whatever resource you use, hit your positionals, etc. If 0 DPS, tanking, and healing was required to beat Zurvan EX and all you had to do was the mechanics, the fight would be a lot easier. SE has echoed this sentiment with their assessment of tuning in Midas. They said that while they felt the mechanics were okay, they didn't properly adjust for how much harder to play the jobs have become in HW. They said that if we were still using our simpler ARR rotations, clear rates for Midas would be higher.
So when you say "sure you can hit a dummy or something like that but this game is mechanic based after all" your ability to execute your rotation is intrinsically tied to your ability to do mechanics. A lot of high-end raiders could probably out DPS 90% of the player-base while blind-folded. They could probably tell you every single action they use in the exact order of usage for large portions of every fight. A good DPS player doesn't look at their keyboard. They don't look at their hot-bars. They don't look at their buff, CD, and DoT timers. They're looking at the fight and mechanics because everything else is basically muscle memory.
My point is you don't need to do the hardest content in the game to improve your comfort level with your job to the point where you can easily execute your rotation while juggling mechanics. You don't need to wipe groups in Zurvan EX to make sure your opener is as natural to you as breathing. You don't need to waste the time of 7 other people to make sure your individual proficiency is at the level where learning a fight is purely about adapting to the mechanics.
So no, you don't agree with me and I'd rather you not distort what I say to fit your delusions.