If so many people with chlamydia don't have symptoms, why is it necessary to get treated?

Long-term sequela: Even though there are no symptoms, treatment should be sought to prevent long-term complications from chlamydial infections such pelvic inflammatory disease, chronic prostatitis, preventing others from getting infected, possible abcess formation, and urinary difficulties.

Disease : Untreated genital chlamydia can lead to sterilization and neonatal deaths. That's why.