hehe bookmarked my answer thankfully
-Fact, WoW as an RPG will always have non skill elements affecting your performance like Ion said, people who truly care about skill and competition dont belong in an RPG aka being competitive in a non competitive game, so anyone obsessing over the “top 100” doesnt say much about their “ability” because RPGs are nowhere near as competitive as overwatch, counter strike, mobas, starcraft. (In a sense RPGS is where average people who cant compete on those games go to feel “skilled”)
-The tryhard attitude has a trickle down effect to bad players who dont understand the game and instead try to copy “what is best” end up making the community and worse and more toxic by refusing to invite or kicking class classes that are not seeing as “meta” even though they can easily do the content they were doing. Example being kicking a TD tank and demanding a vers stack tank for a 15 while vers stack tanks are only needed for 25+, it shows their ignorance and that ignorance is hurting the community.
-Fact, RPGs are for people who enjoy character building, if you have no interest in character building or systems or mechanics and your only interest is to get in, get your gear and “win” you dont belong to the RPG genre. Ion said it best, THIS ISNT AN FPS WHERE YOU JUMP IN, GET YOUR LOADOUT AND FIGHT.
-Bad players by copying the meta remain bad players because they dont learn or understand their class in depth and often perform worse compared to a non meta player who knows their class well, that is why in dungeons you meet BM hunters or DHs who should be obliterating you in AoE yet a shadow priest beats them, therefore we need to push for people to stick to classes they like instead of “what is good” so they focus on learning their class and improving their actual skills instead of copying meta.
-BALANCE, that is a major point for Blizzard. Raids, m+ and all content is balanced around healthy combs without everyone being ultra optimal, unlike what tryhards want to tell themselves Blizzard doesnt balance around optimal combs and players otherwise 95% of the playerbase wouldnt be able to beat the content. Therefore we balance around healthy combs that are below ultra optimal classes and combs. Let’s say we have an AoE boss, that boss should be beatable on mythic by a balanced group of 20 skilled players without needing everyone to be uber aoe optimal, now the tryhard group instead of doing the fight will instead stack 14 AoE specs with huge aoe focused builds and legendaries and will roflstomp through the encounter therefore reducing the difficulty of the encounter to baby mode. While the other guild who did the encounter with a balanced comb dealt with the difficulty the devs intended.
-Delusions. People who play meta often arent that good but because they get carried by meta, as well as the fact that they are invited to groups they dont deserve (I ve seen leaders invite DHs because they are seen as meta in a m+ only for us to carry them, the leader didnt care to search for signs of skill, they just though demon hunters are good therefore invite) therefore getting more chances to actually also have good gear. This creates the delusion of skill while in reality if you put that person to play a sub optimal class their total cluelessness and lack of skill would be revealed.
The same can happen with guilds, tryhard guilds that stack FotM or the broken OP AoE spec for the AoE raid boss fight are nowhere near as skilled as a group that beats the same boss with a balanced comb, so bad players can become very toxic because they have deluded themselves they are great players so any wipe can trigger them into a toxic outburst which is another thing that makes the community worse.