Why didn't Spartans resist such an austere system?

Spartans did not resist their austere system largely due to their intense socialization from a young age, which ingrained in them a sense of duty, discipline, and loyalty to the state. The agoge training and communal lifestyle fostered a collective identity that prioritized the needs of Sparta over individual desires. Additionally, the societal structure, which included a focus on military prowess and the belief in Spartan superiority, reinforced acceptance of their harsh realities. Fear of the consequences of dissent and the desire to maintain their status as a dominant warrior society also contributed to their compliance.