Simple, repetitive activity that generates income attracts bots and, while a violation of CCP’s license agreement, botting and RMT are generally not violation of real world laws.
Bots work best if activities are linear and predictable. You can complicate things by making the activity non-linear and unpredictable, where the ability to recognize patterns is important to a successful outcome. This also complicates life for developers and real players - is it a worthwhile tradeoff?