You do know how to lose players, indeed. These programs caused various issues in the past, including the removal of legit players. Similar to the anti-ddos measures taken previously. So it's a double-edged sword.
In that case, what do you suggest? Leave everything as it is, let the bots farm, and let the cheaters continue to dominate?
In fact, I don't know people who left Aion because there is a bunch of botters in groups killing off mobs in Heiron or wherever. They might have some influence on the economy and buyers gain unfair advantage, but most people who left recently were just bored with the current patch.
Just because you don't know people like that doesn't mean they don't exist. I ve asked my fellow guildmates and streamers the reason for leaving and one of the reasons for leaving was specifically cheaters (speedhack, see through invis with no skills or items, blink, teleport, etc.)