Final answer:
Medea and the Corinthian women's main concern about her banishment is the fear of isolation, which would leave Medea socially and financially vulnerable in a society that provides few protections for women on their own.
Step-by-step explanation:
Medea and the Corinthian women are concerned about her banishment primarily due to the fear of isolation. In ancient times, being cast out of one's city-state was a severe form of punishment, often leaving the individual socially and financially destitute. Medea, known for her intelligence and capabilities, understands the implications of banishment. The potential for poverty certainly exists, but the isolation from social and protective structures is paramount. Medea's abilities and rationality, highlighted by her carefully plotting vengeance against her deceitful husband, Jason, do not negate the significant impact that exile would have on her situation. The fear of vengeance and public opinion also play roles, given Medea sends a poisoned cloak resulting in the deaths of her rival and the king. Nonetheless, the prevailing concern lies in the solitude and vulnerability that banishment entails, especially for a woman in ancient Greek society.