Life is a journey of constant pursuit.
A person without goals or ambition is incomplete.
Aizen was a complete person; he had aspirations and ambitions.
He also desired to become stronger.
Right now, the quickest way for him to grow stronger was by completing every task given by the system.
This wasn't an over-reliance; it was making full use of everything beneficial to him.
Only those who knew how to leverage their resources could become truly powerful.
This time, the system granted Aizen's wish and triggered a new task. However, the requirements for this task were extremely harsh, and the penalties were severe.
He had to become an outer sect disciple within a month. This was a daunting challenge; if it had been easy, someone like Leo wouldn't have remained a black-clothed disciple for over three years without being promoted.