Macros aren't a new thing to old L2. Most hardcore parties ran ahk/keyboard macros since C1. The truly degenerate ran scripts and the like until the mass purge 2 years back. This game has always been about killing literally hundreds of thousands of mobs for meaningful character progression. Right clicking until your mouse breaks isn't engaging gameplay. Neither is sitting in an AoE/pole party while they carry you towards relevance.
Macros give the common player the ability to keep up with the inevitable account sharers, farmers, and bots. Yes this function can be abused, but it is not without risk. Macro parties are easily killed, and in classic exp/rez is not cheap. Don't like it? Go kill them. Better yet, advocate for item drop on death. As it will deter both in and out of game automation.