Every online game with RPG elements devolves into this it seems. The community min-maxes the fun out of it.
Destiny is like this now. There is a cottage industry of Destiny scientists who make YouTube videos that fill in the knowledge gap intentionally created by Bungie's vague descriptions of class abilities and traits. For instance, Bungie might write a description for a class trait like "while you have an elemental buff, your class ability regenerates more quickly". Then the scientists conduct experiments in the game to answer questions like how quickly? Is there a cap on the maximum amount of ability regen? how long does the buff last? does it stack with other class regen buffs, etc. Then the build theory crafting happens based on these findings and the community settles on a few meta builds.
Of course, Bungie will nerf or buff things at will. And so with every new patch, comes a new round of experiments, theorycrafting, and meta builds. The community has little tolerance for those not using meta builds and you'll sometimes be kicked out of LFG if your gear is non meta. Have a build that is fun to play but slightly less efficient at damage output? Too bad, you're kicked.
And because of the super vague descriptions, you can't just reason about builds with only in game knowledge. It requires you to spend a bunch of time on YouTube, reddit, discord, etc and to keep up to date with patches. It's like a part time job.