After careful, diligent curiosity I have found that 30% of the players of this game are unrepentant hackers that somehow don't get perma-banned by Nexon.
After further diligence I have discovered that some of the end-game bosses are mathematically, scientifically impossible to complete without hacking. Thus, Nexon requires hacking at end-game. So learn how to hack. Nexon loves it.