As it turns out, this game is not perfectly balanced throughout all possible player choices. A game like PSO2 is too complex for such a balance to occur.

Many players do care about their performance. So, through theory-crafting and through experimentation, best practices emerge, and players' play-styles tend to converge.

If you have a problem with people copying best practices, maybe you should try playing in non-expert MPAs. I think you will find more original play-styles there.